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Paper writing checklist by Prof Xiaohang Li.<pdf>

Book Chapters and Special Technical Reports

  1. III-N Wide Bandgap Deep-Ultraviolet Lasers and Photodetectors, Volume 96, Semiconductors and Semimetals series, Elsevier. <link>
  2. "Sapphire substrates slash the cost of deep UV lasers", Editorial of Compound Semiconductor Magazine, June 2016. <pdf>
  3. Future Developments in MOVPE, Metalorganic Vapor Phase Epitaxy (MOVPE): Growth, Materials Properties and Applications, Wiley. <link>.
  4. Ultraviolet Lasers, Nanoscale Semiconductor Lasers, Elsevier. <link>

Journal Papers

  1. Y. Lu, Y. Guo, Z. Liu, J. Yan, J. Wang, J. Li, and X. Li* “Monolithic Integration of Deep Ultraviolet and Visible Light-emitting Diodes for Radiative Sterilization Application,” Appl. Phys. Lett. in press (2024).

  2. S. Yuvaraja, V. Khandelwal, S. Krishna, Y. Lu, Z. Liu, M. Kumar, D. Chettri, X. Tang, G. I. M. García, C.-H. Liao, and X. Li* “Enhancement-mode Ambipolar Thin-film Transistors and CMOS Logic Circuits using Bilayer Ga2O3/NiO Semiconductors,” ACS Appl. Mater. Interfaces in press (2024).

  3. Z. Liu, Y. Lu, H. Cao, R. A. Vazquez, R. Lin, N. Xiao, X. Tang, M. Nong, S. Li, T. Liu, X. Li*, “Multi-wavelength and broadband AlGaN-based LED for versatile and artificial UV light source,” Micro and Nanostructures 187, 207755 (2024).

  4. R. R. Aguileta-Vazquez, Z. Liu, F. AlQatari, Y. Lu, X. Tang, P. A. Miranda-Cortez, and X. Li*, “Polarization-matching and carrier confinement in III-Nitride deep-ultraviolet light-emitting diodes,” J. Appl. Phys. 134, 184501 (2023).

  5. S. Yuvaraja, V. Khandelwal, X. Tang, and X. Li*, “Wide bandgap semiconductor-based integrated circuits,” Chip 2, 10072 (2023)

  6. D. Chettri, G. Mainali, A. C, V. Khandelwal, S. Yuvaraja, X. Na, X. Tang, and X. Li*, “Monolithic βGa2O3 Pseudo-CMOS,” IEEE Trans. Electron Devices 70, 5051 (2023).

  7. A. Mukherjee (co-first), J. M. T. Vasquez (co-first), Aasim Ashai, S. Yuvaraja, M. Rajbhar, B. Sarkar, X. Li, “Detailed band alignment of high-B-composition BGaN with GaN and AlN,” J. Phys. D. 56, 485104 (2023).
  8. Y. Lu, X. Zou, S. Krishna, X. Tang, Z Liu, M. Nong, C.-H. Liao, S. Yuvaraja, M. Ben Hassine, H. Fariborzi, and X. Li*, “Thermal Mismatch Engineering Induced Freestanding and Ultrathin Ga2O3 Membrane for Vertical Electronics,” Mater. Today Phys. 36, 101181 (2023). <pdf>



  9. N. Xiao, S. Yuvaraja, D. Chettri, Z. Liu, Y. Lu, C. Liao, X. Tang, and X. Li*, “The influence of annealing atmosphere on sputtered indium oxide thin-film transistors,” J. Phys. D. 56, 425102 (2023). <pdf>



  10. F. AlQatari, C.-H. Liao, R.R. Vázquez, X. Tang, S. Lopatin, and X. Li*, “Detailed band alignment of high-B-composition BGaN with GaN and AlN,” J. Phys. D. 56, 385305 (2023).<pdf>



  11. V. Khandelwal, M. Rajbhar, G. M. García, X. Tang, B. Sarkar, and X. Li*, “Demonstration of βGa2O3 nonvolatile flash memory for oxide electronics for oxide electronics,” Jpn. J. Appl. Phys. 62, 060902 (2023).<pdf>



  12. C. Wang, X. Xu, S. Tyagi, P.C. Rout, U. Schwingenschlӧgl, B. Sarkar, V. Khandelwal, X. Liu, L. Gao, M. N. Hedhili, H. N. Alshareef, and X. Li*, “Ti3C2Tx MXene van der Waals gate contact for GaN high electron mobility transistors,” Adv. Mat. 2023, 2211738 (2023).<pdf>



  13. V. Khandelwal, S. Yuvaraja, G. I. M. García, C. Wang, Y. Lu, F. AlQatari, X. Li*, “Monolithic β- Ga2O3 NMOS IC based on heteroepitaxial E-mode MOSFETs,” Appl. Phys. Lett. 122, 143502 (2023).<pdf>



  14. C. Wang and X. Li*, “Interface dipole induced threshold voltage shift in the Al2O3/GaN heterostructure,” Appl. Surf. Sci. 622, 156954 (2023).<pdf>



  15. X. Tang, Y. Lu, and X. Li*, “Flexible Gallium Oxide Electronics,” Semicond. Sci. Technol. 38, 063001 (2023).<pdf>



  16. X. Tang, Y. Lu, R. Lin, C.-H. Liao, Y. Zhao, K.-H. Li, N. Xiao, W. H. Babatain, and X. Li*, “Flexible Self-powered DUV Photodetectors with High Responsivity Utilizing Ga2O3/NiO heterostructure on Buffered Hastelloy Substrates,” Appl. Phys. Lett. 122, 121101 (2023).<pdf>



  17. J. M. T. Vasquez, A. Ashai, Y. Lu, V. Khandelwal, M. Rajbhar, M. Kumar, X. Li*, B. Sarkar*, “A self-powered and broadband UV PIN photodiode employing a NiOx layer and a β-Ga2O3 heterojunction,” J. Phys. D. 56, 065104 (2023).<pdf>



  18. C. Wang, F. AlQatari, V. Khandelwal, R. Lin, X. Li*, “Origin of interfacial charges of Al2O3/Si and Al2O3/GaN heterogeneous heterostructures,” Appl. Surf. Sci. 608, 155099 (2023).<pdf>



  19. N. I. Kim, M. Yarali, M. Moradnia, M. Aqib, M.H. Ji, V.S. Parameshwaran, A. Sampath, C.-H. Liao, F. AlQatari, M. Nong, X. Li, J.-H. Ryou, "Piezoelectric Sensors Operating at Very High Temperatures and in Extreme Environments Made of Flexible Ultrawide-Bandgap Single-Crystalline AlN Thin Films," Adv. Funct. Mater. 33, 2212538 (2023).<pdf>3


  20. C. Wang and X. Li*, “Correlative atomic coordination and interfacial charge polarity in Al2O3/GaN and Al2O3/Si heterostructures,” Phys. Status Solidi Rapid Res. Lett. 2022, 2200413 (2022).<pdf>2


  21. R. Lin, Z. Liu, H Peng, R. Lin, Y. Lu, H. Cao, C. Wang, V. Khandelwal, X. Zhang, and X. Li*, “Machine learning study on superlattice electron blocking layer design for AlGaN deep ultraviolet light-emitting diodes using the stacked XGBoost/LightGBM algorithm,” J. Mater. Chem. C 10, 17602 (2022).<pdf>



  22. Z. Liu, M. Nong, Y. Lu, H. Cao, S. Yuvaraja, N. Xiao, Z. Alnakhli, R. A. Vazquez, X. Li*, “Effect of AlN strain compensation layer on InGaN quantum well red light emitting diodes beyond epitaxy,” Opt. Lett. 47, 6229 (2022).<pdf>1


  23. Y. Lu, S. Krishna, C.-H. Liao, Z. Yang, M. Kumar, Z. Liu, X. Tang, N. Xiao, M. Hassine, S. Thoroddsen, and X. Li* “Transferrable Ga2O3 Membrane for Vertical and Flexible Electronics via One-step Exfoliation,” ACS Appl. Mater. Interfaces. 14, 34844 (2022).<pdf>1


  24. Z. Alnakhli, R. Lin, C.-H. Liao, A. E. Labban, and X. Li*, “Reflective metalens with enhanced off-axis focusing performance,” Opt. Express 30, 34123 (2022).<pdf>3


  25. F. AlQatari, C.-H. Liao, X. Li*, “Demonstration of MOCVD-grown BGaN with over 10% boron composition,” AIP Adv. 12, 085318 (2022).<pdf>110


  26. Y. Lu, S. Krishna, X. Tang, W. Babatain, M. Hassine, C.-H. Liao, N. Xiao, Z. Liu, and X. Li*, “Ultrasensitive Flexible κ-phase Ga2O3 Solar-blind Photodetector,” ACS Appl. Mater. Interfaces. 14, 34844 (2022).<pdf>109


  27. M. Shan, C. Guo, Y. Zhao, Q. Chen, L. Deng, Z. Zheng, S. Tan, W. Guo, J. Dai, F. Wu, X. Li*, C. Chen, “Enhancement of DUV emission from strain modulated quantum wells via the reflection of nanoporous AlGaN distributed Brag reflectors,” ACS Appl. Nano Mater. 5, 10081 (2022).<pdf>107


  28. Y. Dai, W. Guo, L. Chen, H. Xu, F. AlQatari, C. Guo, X. Peng, K. Tang, C.-H. Liao, X. Li*, J. Ye*, “Polarization modulation of 2DEG towards plasma-damage-free GaN HEMT isolation,” Appl. Phys. Lett. 121, 012104 (2022).<pdf>107


  29. S. Krishna, Y. Lu, C.-H. Liao, V. Khandelwal, X. Li*, “Band alignment of orthorhombic Ga2O3 with GaN and AlN semiconductors,” Appl. Surf. Sci. 599, 153901 (2022).<pdf> 106


  30. C Wang, Y Lu, CH Liao, S Chandroth, S Yuvaraja, X Li*, "Highly suppressed interface traps of Al2O3/GaN through interposing a stoichiometric Ga2O3 layer," Jpn. J. Appl. Phys. 61, 060906 (2022).<pdf>



  31. C. Zhao, G. Deng, L. Zhang, Y. Wang, Y. Niu, J. Yu, Z. Shi, G. Du, X. Li, Y. Zhang, “Realization of p-type conduction in compositionally graded quaternary AlInGaN,” Micro and Nanostructures 170, 207377 (2022).<pdf>



  32. W Gu, Y Lu, Z Liu, CH Liao, J Yan, J Wang, J Li, X Li*, "Enhanced hole concentration in strain-compensated BAlN/AlGaN superlattice for deep ultraviolet light-emitting diodes," Micro and Nanostructures 163, 107128 (2022).<pdf>



  33. C. Zou, Q. Liu, K. Chen, F. Chen, Z. Zhao, Y. Cao, C. Deng, X. Wang, X. Li, S. Zhan, F. Gao, S Li, “A high-performance polarization-sensitive and stable self-powered UV photodetector based on a dendritic crystal lead-free metal-halide CsCu2I3/GaN heterostructure,” Mater. Horiz. 9, 1479 (2022).<pdf>



  34. A. Mballo, A. Ahaitouf, Suresh Sundaram, A. Srivastava, V. Ottapilakkal, R. Gujrati, P. Vuong, S. Karrakchou, M. Kumar, X. Li, Y. Halfaya, S. Gautier, P. L. Voss, J. P. Salvestrini, and A. Ougazzaden, “Natural boron and 10B-enriched hexagonal Boron Nitride for high sensitivity self-biased metal-semiconductor-metal neutron detectors,” ACS Omega 7, 804 (2022).<pdf>



  35. Z Liu, Y Lu, Y Wang, R Lin, C Xiong, X Li*, "Polarization modulation at last quantum barrier for high efficiency AlGaN-based UV LED," IEEE Photonics Journal 14, 8210208 (2022).<pdf>



  36. X. Tang, K.-H. Li, Y. Zhao, H. Liang, Z. Liu, U. Buttner, C.-H. Liao, L. Braic, Z. Mei, X. Du, W. Tang, X. Li*, “Quasi-epitaxial Growth of β-Ga2O3 Coated Wide Bandgap Semiconductor Tape for Flexible UV Photodetectors,” ACS Appl. Mater. Interfaces. 14, 1304 (2022).<pdf>



  37. S. Kaushik, S. Karmakar, P. Bisht, C.-H. Liao, X. Li, R. K. Varshney, B. R. Mehta, R. Singh, “Localized surface plasmon resonance-enhanced solar-blind Al0.4Ga0.6N MSM photodetectors exhibiting high-temperature robustness,” Nanotechnology 33, 145202 (2022).<pdf>



  38. Z. Yan, S. Li, Z. Liu, W. Liu, F. Qiao, P. Li, J. Dai, Y. Wang, Y. Zhi, J. Yue, X. Ji, X. Tang, X. Li, Z. Wu, and W. Tang, “Ti3C2/ε-Ga2O3 Schottky Self-powered Solar-blind Photodetector with Robust Responsivity,” IEEE J. Sel. Top. Quantum Electron. 28, 3803208 (2022).<pdf>



  39. X. Tang, K.-H. Li, C.-H. Liao, J. Taboada, C. Wang, N. Xiao, and X. Li*, “Chemical solution deposition of epitaxial indium and aluminum doped Ga2O3 thin-films on sapphire with tunable bandgaps,” J. Eur. Ceram. Soc. 42, 175 (2022).<pdf>3


  40. X. Tang, K.-H. Li, C.-H. Liao, D. Zheng, C. Liu, S. Krishna, J. Taboada, and X. Li*, “Epitaxial growth of β-Ga2O3 (-201) thin film on fourfold symmetry CeO2 (001) substrate for heterogeneous integrations,” J. Mater. Chem. C 9, 15868 (2021).<pdf>4


  41. R. Lin, P. Han, Y. Wang, R. Lin, Y. Lu, Z. Liu, X. Zhang, and X. Li*, “Low resistance asymmetric III- nitride tunnel junctions designed by machine learning,” Nanomaterials 11, 2466 (2021).<pdf>5


  42. F. AlQatari, M. Sajjad, R. Lin, K.-H. Li, U. Schwingenschlög, and X. Li*, “Lattice-matched III-nitride structures comprising BAlN, BGaN, and AlGaN for ultraviolet applications,” Mater. Res. Express 8, 086202 (2021).<pdf>6


  43. B. R. Tak, S. Kumar, A. K. Kapoor, D. Wang, X. Li, H. Sun and R. Singh, “Recent advances in the growth of gallium oxide thin films employing various growth techniques-A review,” J. Phys. D: Appl. Phys. 54, 453002 (2021).<pdf> 7


  44. Z. Zheng, Q. Chen, A. Wang, R. Liang, Y. Zhang, M. Shan, F. Wu, W. Zhang, C. Chen, J. Dai, X. Li, "Enhanced light extraction efficiency via double nano-pattern arrays for high-efficiency deep UV LEDs," Opt. Laser Technol. 143, 107360 (2021).<pdf>

    J091 Zheng OLT 2021
  45. M. Shan, Y. Zhang, M. Tian, R. Lin, J. Jiang, Z. Zheng, Y. Zhao, Y. Lu, Z. Feng, W. Guo, J. Dai, C. Chen, F. Wu, X. Li*, “Transverse electric lasing at record short wavelength 244.63 nm from GaN quantum wells with weak exciton localization,” ACS Photonics 8, 1264 (2021).<pdf>

  46. Y. Lu, C. Wang, V. P. D. Oliveira, Z. Liu, and X. Li*, “UV light-emitting diode with buried polarization-induced n-AlGaN/InGaN/p-AlGaN tunneling junction,” IEEE Photonics Technol. Lett. 33, 16 (2021).<pdf>



  47. S. Kaushik, T. Naik, M. Ravikanth, C.-H. Liao, X. Li, VR Rao, R Singh, “Organic passivation of AlGaN epilayers using self-assembled monolayer of Zn(II) porphyrin for improved solar-blind photodetector performance,” Semicond. Sci. Technol. 36, 055001 (2021).<pdf>



  48. M Cui, W Guo, H Xu, J Jiang, L Chen, S Mitra, IS Roqan, H Jiang, X. Li, and Y. Ye, “EvidenM Cuice of carrier localization in AlGaN/GaN based ultraviolet multiple quantum wells with opposite polarity domains provided by nanoscale imaging,” Phys. Status Solidi Rapid Res. Lett. 2121, 2100035 (2021).<pdf>



  49. W. Gu, Y. Lu, R. Lin, W. Guo, Z.-H. Zhang, J.-H. Ryou, J. Yan, J. Wang, J. Li, and X. Li*, "BAlN for III-nitride UV light emitting diodes: undoped electron blocking layer," J. Phys. D: Appl. Phys. 54, 175104 (2021).<pdf>



  50. R. Lin, Z. Alnakhli, and X. Li*, “Engineering of multiple bound states in the continuum by latent representation of freeform structures,” Photonics Res. 9, 4 (2021).<pdf>



  51. C.-H. Liao, K.-H. Li, C. G Torres-Castanedo, G. Zhang, and X. Li*, “Wide-range tunable bandgap β-phase (AlGa)2O3 thin film by thermal annealing,” Appl. Phys. Lett. 118, 032103 (2021).<pdf>



  52. N.-I. Kim, J. Chen, W. Wang, M. Moradnia, S. Pouladi, M.-K. Kwon, J.-Y. Kim, X. Li, and J.-H. Ryou, “Highly-Sensitive Skin-Attachable Eye-Movement Sensor Using Flexible Non-Hazardous Piezoelectric Thin Film,” Adv. Funct. Mater. 31, 2008242, (2021).<pdf> 4


  53. J. Sarker, T. B. Tran, C.-H. Liao, F. Alqatari, X. Li*, B. Mazumder*, “Nanoscale compositional analysis of wurtzite BAlN thin film using atom probe tomography,” Appl. Phys. Lett. 117, 232103 (2020). <pdf> 5


  54. J. Shi, Y. Zhao, Y. Wu, J. Chu, X. Tang, X. Li, X. Yu, W. Wu. G. Jiang, H. Suo, and Z. Jin, "Pyrolysis Behaviors Dominated by Reaction-Diffusion Mechanism in Fluorine-Free Metal Organic Decomposition Process" J. Mater. Chem. C, 8, 17417 (2020).<pdf> 6


  55. T. B. Tran, C.-H. Liao, F. Alqatari, and X. Li*, “Demonstration of single-phase wurtzite BAlN with over 20% boron content by metalorganic chemical vapor deposition,” Appl. Phys. Lett. 117, 082102 (2020).<pdf> Tinh. APL


  56. X. Tang and X. Li*, “Ripening of gold clusters into single domain on semiconductor quantum rods during Langmuir-Blodgett deposition,” Cryst. Growth Des. 20, 9, 5890 (2020).<pdf>2


  57. R. Lin, X. Liu, K. Liu, Y. Lu, X. Liu, X. Li*, " BAlN alloy for enhanced two-dimensional electron gas characteristics of GaN/AlGaN heterostructures," J. Phys. D: Appl. Phys. 53, 48 (2020).<pdf>3


  58. R. Lin, Z. Alnakhli, F. AlQatari, and X. Li*, “Design of dielectric reflective metalens: analysis of tapered nanopillars,” IEEE Photonics J. 12, 4 (2020).<pdf>4


  59. Y. Zhang, G. Deng, Y. Yu, Y. Wang, D. Zhao, Z. Shi, B. Zhang, X. Li*“Demonstration of N-polar III-nitride tunnel junction LED,” ACS Photonics 7 (7), 1723 (2020). <pdf> ACS Photonics 7 (7), 1723 (2020)


  60. I. Ajia, D. Almalawi, Y. Lu, S. Lopatin, X. Li, Z. Liu, and I. Roqan, “Sub-quantum-well influence on carrier dynamics in high efficiency DUV dislocation-free AlGaN/AlGaN-based multiple-quantum-wells,” ACS Photonics 7 (7), 1667 (2020).<pdf> 6


  61. C. G. Torres-Castanedo, K. H. Li, L. Braic, and X. Li*, “Determination of band offsets of Ga2O3:Si/FTO heterojunction for current spreading for high temperature and UV applications,” J. Phys. D: Appl. Phys. 53, 314003 (2020). <pdf>7


  62. W. Guo, L. Chen, H. Xu, Y. Qian, M. Sheikhi, J. Hoo, S. Guo, L. Xu, J. Liu, F. Alqatari, X. Li, K. He, Z. C. Feng, and J. Ye, “Revealing the surface electronic structures of AlGaN deep ultraviolet multiple-quantum-wells with lateral polarity domains,” Photonics Res. 8, 812 (2020) <pdf>8
  63. W. Wang, J. Chen, J. S. Lundh, S. Shervin, S. K. Oh, S. Pouladi, Z. Rao, J.-Y. Kim, M.-K. Kwon, X. Li, S. Choi, and J.-H. Ryou, "Modulation of the 2-Dimensional Electron Gas Channel in Flexible AlGaN/GaN High-Electron-Mobility Transistors by Mechanical Bending," Appl. Phys. Lett. 116, 123501 (2020). <pdf>9


  64. R. Lin, Y. Zhai, C. Xiong, and X. Li*, “Inverse design of plasmonic metasurfaces by convolutional neural network,” Opt. Lett. 45, 11362 (2020). <pdf>10


  65. J. Hou, B. Yang, X. Li, C. Ma, B. Wang, H. Long, C. Yang, and S. Chen, "Efficient and stable thin film crystalline silicon solar cell by introducing rotation factor in surface square-pillar-array-grating," J. Nanophotonics 14, 016008 (2020). <pdf>11


  66. N. Alfaraj, W. Alghamdi, M. Alawein, I. Ajia, D. Priante, B. Janjua, H. Sun, T. Ng, B. Ooi, I. Roqan, X. Li, "Time–Energy Quantum Uncertainty—Quantifying the Effectiveness of Surface Defect Passivation Protocols for Low-Dimensional Semiconductors," ACS Appl. Electron. Mater. 2020, 409 (2020). <pdf>ACS Appl. Electron. Mater. 2020, 409 (2020)


  67. R. Lin, V. Mazzone, N. Alfaraj, J. Liu, X. Li*, and A. Fratalocchi*, "On‐Chip Hyperuniform Lasers for Controllable Transitions in Disordered Systems," Laser & Photonics Rev. 2020, 1800296 (2020). <pdf>13


  68. Z. Liu, Y. Zhi, S. Li, Y. Liu, X. Tang, Z. Yan, P. Li, X. Li, D. Guo, Z. Wu, and W. Tang, "Comparison of optoelectrical characteristics between Schottky and Ohmic contacts to β-Ga2O3 thin film," J. Phys. D: Appl. Phys. 53, 085105 (2020). <pdf>14


  69. X. Li*, R. D. Dupuis, T. Wernicke, “Semiconductor UV photonics: feature introduction,” Photon. Res. 7, SUVP1 (2019). <pdf>
  70. Q. Chen, J. Dai, X. Li, Y. Gao, H. Long, Z.-H. Zhang, C. Chen, and H.-C. Kuo, “Enhanced optical performance of AlGaN-based deep ultraviolet light-emitting diodes by electrode patterns design,” IEEE Electron Device Lett. 40, 1925 (2019). <pdf>16
  71. M. Shan, Y. Zhang, T. B. Tran, J. Jiang, H. Long, Z. Zheng, A. Wang, W. Guo, C. Chen, J. Dai, and X. Li, “Deep UV laser at 249 nm based on GaN quantum wells,” ACS Photonics 6, 2387 (2019). <pdf>17


  72. W. Guo, S. Mitra, J. Jiang, H. Xu, M. Sheikhi, H. Sun, K. Tian, Z.-H. Zhang, H. Jiang, I. Roqan, X. Li, and J. Ye, " Three-dimensional band diagram in lateral polarity junction III-nitride heterostructures," Optica 6, 1058 (2019). <pdf>18


  73. M. Garg, A. Kumar, H. Sun, C.-H. Liao, X. Li, and R. Singh, "Temperature dependent electrical studies on Cu/AlGaN/GaN Schottky barrier diodes with its microstructural characterization," J. Alloys Compd. 806, 852 (2019). <pdf>19


  74. R. Lin and X. Li*, "Multifocal metalens based on multilayer Pancharatnam-Berry phase elements architecture," Opt. Lett. 44, 2819 (2019). <pdf>20


  75. Y. Lu, J. Yan, X. Li, Y. Guo, Z. Wu, L. Zhang, W. Gu, J. Wang, and J. Li, "On the Carrier Regulation and Performance Enhancement of N-polar AlGaN-based LED with Grading Quantum Barriers," Acta. Phys. Sin. 48, 0723001 (2019). <pdf>21


  76. B. R. Tak, M. Garg, S. Dewan, C. G. Torres-Castanedo, K.-H. Li, V. Gupta, X. Li, and R. Singh, "High-Temperature Photocurrent Mechanism of β-Ga2O3 Based Metal-Semiconductor-Metal Solar-Blind Photodetectors," J. Appl. Phys 125, 144501 (2019). <pdf>22


  77. J. Dai, J. Chen, X. Li, J. Zhang, H. Long, H.-C. Kuo, Y. He, and C. Chen, "Ultraviolet polarized light emitting and detecting dual-functioning device based on nonpolar n-ZnO/i-ZnO/p-AlGaN heterojunction," Opt. Lett. 44(8), 1944 (2019). <pdf>23


  78. Z. Ren, Y. Lu, H. Sun, H.-H. Yao, C.-H. Liao, J. Dai, C. Chen, J.-H. Ryou, J. Yan, J. Wang, J. Li, and X. Li, “III-nitride Deep UV LED without Electron Blocking Layer,” IEEE Photon. J. 11(2), 8200511 (2019). <pdf>24


  79. N. Susilo, M. Schilling, M. Narodovitch, H.-H. Yao, X. Li, B. Witzigmann, J. Enslin, M. Guttmann, M. Rychetsky, I. Koslow, T. Wernicke, T. Niermann., M. Lehmann, and M. Kneissl, "Precise determination of polarization fields in c-plane GaN/AlxGa1−xN/GaN heterostructures with capacitance-voltage-measurements," ‎Jpn. J. Appl. Phys 58, SCCB08 (2019). <pdf>25


  80. D. Priante, M. Tangi, J.-W. Min, N. Alfaraj, J.-W. Liang, H. Sun, H. H. Alhashim, X. Li, A. M. Albadri, A. Y. Alyamani, T. K. Ng, and B. S. Ooi, “Enhanced electro-optic performance of surface-treated nanowires: origin and mechanism of nanoscale current injection for reliable ultraviolet light-emitting diodes,” Opt. Mater. Express. 1, 203 (2019). <pdf>26


  81. C. Kai, X. Sun, Y. Jia, Z. Shi, K. Jiang, J. Ben, Y. Wu, Y. Wang, H. Liu, X. Li, and D. Li, "Carrier behavior in the vicinity of pit defects in GaN character-ized by ultraviolet light-assisted Kelvin probe force microscopy," Sci. China. Phys. Mech. J. 62, 067311 (2019). <pdf>27


  82. H. Sun and X. Li, "Recent Advances on III-Nitride Nanowire Light Emitters on Foreign Substrates – Toward Flexible Photonics," Phys. Status Solidi A 216, 1800420 (2019). <pdf>28


  83. M. Garg, T. Naik, R. Pathak, V. R. Rao, C.-H. Liao, K.-H. Li, H. Sun, X. Li, and R. Singh, "Surface passivation process for AlGaN/GaN HEMT heterostructures using phenol functionalized-Porphyrin based organic molecules," J. Appl. Phys. 124, 195702 (2018). <pdf>29


  84. H. Sun, Y. J. Park, K.-H. Li, X. Liu, T. Detchprohm, X. Zhang, R. D. Dupuis, and X. Li*, “Nearly-zero valence band and large conduction band offset at BAlN/GaN heterointerface for optical and power device application,” Appl. Surf. Sci. 458, 949 (2018). <pdf>30


  85. H. Sun, D. Priante, J.-W. Min, R. C. Subedi, M. K. Shakfa, Z. Ren, K.-H. Li, R. Lin, C. Zhao, T. Ng, J.-H. Ryou, X. Zhang, B. S. Ooi, and X. Li*, "Graded-Index Separated Confinement Heterostructure AlGaN Nanowires: Towards Ultraviolet Laser Diodes Implementation," ACS Photonics, 5, 3305 (2018). <pdf>H. Sun,ACS Photonics


  86. S. Singh, S. Shervin, H. Sun, M. Yarali, J. Chen, R. Lin, K.-H. Li, X. Li, J.-H. Ryou, A. Mavrokefalos, "Using Mosaicity to Tune Thermal Transport in Polycrystalline AlN Thin Films," ACS Appl. Mater. Inter. 10, 20085 (2018). <pdf>32


  87. W. Guo, H. Sun, B. Torre, J. Li, M. Sheikhi, J. Jiang, H. Li, S. Guo, K.-H. Li, R. Lin, A. Giugni, E. D. Fabrizio, X. Li, and J. Ye, "Lateral-Polarity-Structure of AlGaN Quantum Wells: A Promising Approach for Enhancing the Ultraviolet Luminescence," Adv. Funct. Mater. 28, 1802395 (2018). <pdf><supplementary>33


  88. L. Yan, Y. Zhang, X. Han, G. Deng, P. Li, Y. Yu, L. Chen, X. Li, and J.-F. Song, “Polarization-induced hole doping in N-polar III-nitride LED grown by metalorganic chemical vapor deposition,” Appl. Phys. Lett. 112, 182104 (2018). <pdf>34


  89. R. Lin, S. V. Galan, H. Sun, Y. Hu, M. S. Alias, B. Janjua, T. K. Ng, B. S. Ooi, and X. Li*, “Tapering-induced enhancement of light extraction efficiency of nanowire deep ultraviolet LED by theoretical simulations,” Photon. Res. 6, 124 (2018). <pdf>R. Lin  Photon. Res.


  90. H. Sun, K.-H. Li, C. G. T. Castanedo, S. Okur, G. S. Tompa, T. Salagaj, S. Lopatin, A. Genovese, and X. Li*, "HCl flow-induced phase change of α-, β- and ε-Ga2O3 films grown by MOCVD," Cryst. Growth Des. 18, 2370 (2018). <pdf>H. Sun Cryst. Growth Des.


  91. K.-H. Li, H. S. Alotaibi, H. Sun, R. Lin, W. Guo, C. G. Torres, K. Liu, S. V. Galan, and X. Li, “Induction-heating MOCVD reactor with significantly improved heating efficiency and reduced harmful magnetic coupling,” J. Cryst. Growth 488, 16 (2018). <pdf>J. Cryst. Growth 488, 16 (2018)


  92. J. Hou, C. Yang, X. Li, Z.-Z. Cao, and S. Chen, “Enhanced complete photonic band gap in moderate refractive index contrast chalcogenide-air system with connected-annular-rods photonic crystals,” Photon. Res 6 (4), 282 (2018). <pdf>38


  93. S. Shervin, S. K. Oh, H. J. Park, K.-H. Lee, M. Asadirad, S.-H. Kim, J. Kim, S. Pouladi, S.-N. Lee, X. Li, J. S. Kwak, and J. H. Ryou “Flexible Deep-Ultraviolet Light-Emitting Diodes for Significant Improvement of Quantum Efficiencies by External Bending,” J. Phys. D: Appl. Phys. 51, 105105 (2018). <pdf>39


  94. H. Sun, M. K. Shakfa, M. Mufasila, B. Janjua, K.-H. Li, R. Lin, I. Roqan, B. Ooi, and X. Li*, "Surface-Passivated AlGaN Nanowires for Enhanced Luminescence of Ultraviolet Light Emitting Diodes," ACS Photonics 5, 964 (2018). <pdf>ACS Photonics 5, 964 (2018)


  95. H. Sun, F. Wu, Y. J. Park, T. M. Al tahtamouni, W. Guo, N. Alfaraj, K.-H. Li, D. H. Anjum, T. Detchprohm, R. D. Dupuis, and X. Li*, “Microstructure revealing and dislocation behavior in BAlN/AlGaN heterostructures,” Appl. Phys. Express 11, 011001 (2018). <pdf>41


  96. N. Alfaraj, M. M. Muhammed, K.-H. Li, B. Janjua, R. A. Aljefri, H. Sun, T. K. Ng, B. S. Ooi, I. S. Roqan, and X. Li, “Thermodynamic photoinduced disorder in AlGaN nanowires,” AIP Adv. 7, 125113 (2017). <pdf>42


  97. K. Liu, H. Sun, F. AlQatari, W. Guo, X. Liu, J. Li, C. G T. Castanedo, and X. Li, "Wurtzite BAlN and BGaN alloys for heterointerface polarization engineering," Appl. Phys. Lett. 111 (22), 222106 (2017). <pdf>43


  98. H. Sun, C. G. T. Castanedo, K. Liu, K.-H. Li, W. Guo, R. Lin, X. Liu, J. Li, and X. Li, “Valence and conduction band offsets of β-Ga2O3/AlN heterojunction,” Appl. Phys. Lett. 111 (16), 162105 (2017). <pdf>44


  99. H. Sun, Y. Park, K.-H. Li, C. G. T. Castanedo, A. S. Alowayed, T. Detchprohm, R. D. Dupuis, and X. Li*, “Band alignment of B0.14Al0.86N / Al0.7Ga0.3N heterojunction,” Appl. Phys. Lett. 111 (12), 122106 (2017). <pdf>45


  100. X. Sun, Z. Zhang, A. Chaaban, T. K. Ng, C. Shen, R. Chen, J. Yan, H. Sun, X. Li, J. Wang, J. Li, M.-S. Alouini, and B. S. Ooi, “71-Mbit/s Ultraviolet-B LED Communication Link based on 8-QAM-OFDM Modulation”, Opt. Express 25 (19), 23267 (2017). <pdf>46


  101. J. Hou, W. Hong, X. Li, C. Yang, and S. Chen, “Biomimetic spiral grating for stable and highly efficient absorption in crystalline silicon thin-film solar cells,” Opt. Express 25(20), A922-A931 (2017). <pdf>47


  102. H. Sun, F. Wu, T. M. Al tahtamouni, N. Alfaraj, K.-H. Li, T. Detchprohm, R. D. Dupuis, and X. Li*, “Structural properties, crystal quality and growth modes of MOCVD-grown AlN with TMAl pretreatment of sapphire substrate,” J. Phys. D: Appl. Phys. 50, 395101 (2017). <pdf>J. Phys. D: Appl. Phys. 50, 395101 (2017)


  103. S. Wang, X. Li, A. M. Fischer, T. Detchprohm, R. D. Dupuis, and F. A. Ponce, “Crystal structure of BAlN thin films: effect of boron concentration in the gas flow,” J. Cryst. Growth 475, 334 (2017). <pdf>49


  104. A. Prabaswara, D. Stowe, B. Janjua, T. K. Ng, D. H. Anjum, P. Longo, C. Zhao, R. T. Elafandy, X. Li, A. Alyamani, M. El-Desouki, and B. S. Ooi, “Spatially resolved investigation of competing nanocluster emission in quantum-disks-in-nanowires structure characterized by nanoscale cathodoluminescence,” J. Nanophoton. 11(2), 026015 (2017). <pdf>50


  105. M. Zhang and X. Li, “Structural and Electronic Properties of Wurtzite BxAl1-xN from First-Principles Calculations”, Phys. Status Solidi B, 254 (8), 1600749 (2017). <pdf>51


  106. F. Wu, H. Sun, I. A. Ajia, I. S. Roqan, D. Zhang, J. Dai, C. Chen, Z. C. Feng, and X. Li, “Significant internal quantum efficiency enhancement of GaN/AlGaN multiple quantum wells emitting at ~350 nm via step quantum well structure design,” J. Phys. D: Appl. Phys. 50, 245101 (2017). <pdf> J. Phys. D: Appl. Phys. 50, 245101 (2017)


  107. H. Sun, F. Wu, Y. J. Park, T. M. Al tahtamouni, K.-H. Li, N. Alfaraj, T. Detchprohm, R. D. Dupuis, andX. Li*, “Influence of TMAl preflow on AlN epitaxy on sapphire,” Appl. Phys. Lett. 110, 192106 (2017). <pdf>Appl. Phys. Lett. 110, 192106 (2017)


  108. N. Alfaraj, S. Mitra, F. Wu, I. Ajia, B. Janjua, A. Prabaswara, R. A. Aljefri, H. Sun, T. K. Ng, B. S. Ooi, I. S. Roqan, and X. Li, “Photoinduced entropy of InGaN/GaN p-i-n double-heterostructure nanowires,” Appl. Phys. Lett. 110, 161110 (2017). <pdf>Appl. Phys. Lett. 110, 161110 (2017)


  109. X. Li, S. Wang, H. Liu, F. A. Ponce, T. Detchprohm, R. D. Dupuis “100-nm thick single-phase wurtzite BAlN films with boron contents over 10%,” Phys. Status Solidi B 254 (8), 1600699 (2017). <pdf>Phys. Status Solidi B 254 (8), 1600699 (2017)


  110. B. Janjua*, H. Sun*, C. Zhao, D. H. Anjum, D. Priante, A. A. Alhamoud, F. Wu, X. Li, A. M. Albadri, A. Y. Alyamani, M. M. El-Desouki, T. K. Ng, and B. S. Ooi, “Droop-free AlxGa1-xN/AlyGa1-yN quantum-disks-in-nanowires ultraviolet LED emitting at 337 nm on metal/silicon substrates”, Opt. Express 25, 2 (2017). <pdf>56


  111. B. Janjua*, H. Sun*, C. Zhao, D. H. Anjum, F. Wu, A. A. Alhamoud, X. Li, A. M. Albadri, A. Y. Alyamani, M. M. El-Desouki, T. K. Ng, and B. S. Ooi, “Self-planarized quantum-disks nanowires ultraviolet-B emitter utilizing pendeo-epitaxy”, Nanoscale 9, 7805 (2017). <pdf>57


  112. X. Li, H. Xie, J. H. Ryou, F. A. Ponce, T. Detchprohm, and R. D. Dupuis, “Onset of surface stimulated emission at 260 nm from AlGaN multiple quantum wells,” Appl. Phys. Lett. 107, 241109 (2015). <pdf>Appl. Phys. Lett. 107, 241109 (2015)


  113. X. Li, T. T. Kao, M. Satter, S. Wang, Y. Wei, H. Xie, S. C. Shen, P. D. Yoder, A. Fischer, and F. A. Ponce, T. Detchprohm, and R. D. Dupuis, “Demonstration of transverse-magnetic dominant deep-ultraviolet stimulated emission from AlGaN multiple-quantum-well lasers on sapphire substrates,” Appl. Phys. Lett. 106, 041115 (2015). <pdf>Appl. Phys. Lett. 106, 041115 (2015)


  114. X. Li, Y. O. Wei, S. Wang, H. Xie, T. T. Kao, M. Satter, S. C. Shen, P. D. Yoder, T. Detchprohm, R. D. Dupuis, A. Fischer, and F. A. Ponce, “Temperature dependence of crystalline quality of AlN layer grown on sapphire substrate by metalorganic chemical vapor deposition,” J. Cryst. Growth 414, 76-78 (2015). <pdf>J. Cryst. Growth 414, 76-78 (2015)


  115. X. Li, S. Wang, Y. O. Wei, H. Xie, T. T. Kao, M. Satter, S. C. Shen, P. D. Yoder, T. Detchprohm, R. D. Dupuis, A. Fischer, and F. A. Ponce, “Growth of high-quality AlN layer on sapphire substrate at relatively low temperatures by metalorganic chemical vapor deposition,” Phys. Status Solidi B 252(5), 1089 (2015). <pdf>61


  116. X. Li, G. Le Gac, S. Bouchoule, Y. El Gmili, G. Patriarche, S. Sundaram, P. Disseix, F. Réveret, J. Leymarie, J. Streque, F. Genty, J-P. Salvestrini, R. D. Dupuis, X. Li, P. L. Voss, and A. Ougazzaden, “Structural and optical investigations of AlGaN MQWs grown on a relaxed AlGaN buffer on AlN templates for emission at 280 nm,” J. Cryst. Growth 432, 37 (2015). <pdf>62


  117. X. Li, T. Detchprohm, T. T. Kao, M. Satter, S. C. Shen, P. D. Yoder, R. D. Dupuis, S. Wang, Y. Wei, H. Xie, A. Fischer, F. A. Ponce, T. Wernicke, C. Reich, M. Martens, and M. Kneissl, “Low-threshold stimulated emission at 249 nm and 256 nm from AlGaN-based multiple-quantum-well lasers grown on sapphire substrates,” Appl. Phys. Lett. 105, 141106 (2014). <pdf>63


  118. M. M. Satter, Z. Lochner, T. T. Kao, Y. S. Liu, X. Li, S. C. Shen, J. H. Ryou, R. D. Dupuis, P. D. Yoder. “AlGaN-Based Vertical Injection Laser Diodes Using Inverse Tapered p-Waveguide for Efficient Hole Transport,” IEEE J. of Quantum Electron. 50, 166 (2014). <pdf>64


  119. M. M. Satter, Z. Lochner, T. T. Kao, Y. S. Liu, X. Li, S. C. Shen, J. H. Ryou, R. D. Dupuis, P. D. Yoder. “Theoretical analysis of strategies for improving p-type conductivity in wurtzite III-nitride devices for high power opto and microelectronic applications,” Phys. Status Solidi C 11, 828 (2014). <pdf>65


  120. Y. S. Liu, Z. Lochner, T. T. Kao, M. M. Satter, X. Li, J. H. Ryou, S. C. Shen, P. D. Yoder, T. Detchprohm, R. D. Dupuis, Y. Wei, H. Xie, A. Fischer and F. Ponce, “Optically pumped AlGaN quantum-well lasers at sub-250 nm grown by MOCVD on AlN substrates,” Phys. Status Solidi C 11, 258 (2014). <pdf>66


  121. X. Li, P. F. Zhu, G. Y. Liu, J. Zhang, R. B. Song, Y. K. Ee, P. Kumnorkaew, and J. F. Gilchrist, and N. Tansu, “Light Extraction Efficiency Enhancement of III-Nitride Light-Emitting Diodes by using 2-D Close-Packed TiO2 Microsphere Arrays,” IEEE J. Display Technol. 9, 5, 324 (2013). <pdf>67


  122. Z. Lochner, X. Li, T. T. Kao, M. Satter, H. J. Kim, S. C. Shen, P. D. Yoder, A. Fischer, and F. A. Ponce, J. H. Ryou, and R. D. Dupuis, “Stimulated emission at 257 nm from AlGaN/AlN heterostructure on AlN substrate,” Phys. Status Solidi A 210, 9, 1768 (2013). <pdf>68


  123. T. T. Kao, Y. S. Liu, M. M. Satter, X. Li, Z. Lochner, P. D. Yoder, T. Detchprohm, R. D. Dupuis, S. C. Shen, , J. H. Ryou, A. M. Fischer,Y. Wei, H. Xie, F. A. Ponce, “Sub-250 nm low-threshold deep-ultraviolet AlGaN-based heterostructure laser employing HfO2/SiO2 dielectric mirrors,” Appl. Phys. Lett. 103, 211103 (2013). <pdf>69


  124. Z. Lochner, T. T. Kao, Y. S. Liu, X. Li, M. M. Satter, S. C. Shen, P. D. Yoder, J. H. Ryou, R. D. Dupuis, “Deep-Ultraviolet Lasing at 243 nm from Photo-Pumped AlGaN/AlN Heterostructure on AlN Substrate,” Appl. Phys. Lett. 102, 101110 (2013). <pdf>70


  125. C. K. Tan, J. Zhang, X. Li, G. Y. Liu, B. O. Tayo, and N. Tansu, “First-Principle Electronic Properties of Dilute-As GaNAs Alloy for Visible Light Emitters,” IEEE J. Display Technol. 9, 4, 272 (2013). <pdf>71


  126. W. H. Koo, W. Youn, P. F. Zhu, X. Li, N. Tansu, and F. So, “Light extraction of organic light emitting diodes using defective hexagonal-close-packed array,” Adv. Funct. Mater. 22, 3454 (2012). <pdf>72


  127. G. Y. Liu, J. Zhang, X. Li, G. S. Huang, T. Paskova, K. R. Evans, H. P. Zhao, and N. Tansu, “Metalorganic Vapor Phase Epitaxy and Characterizations of Nearly-Lattice-Matched AlInN Alloys on GaN / Sapphire Templates and Free-Standing GaN Substrates,” J. Cryst. Growth 340, 66 (2011). <pdf>73


  128. W. Cao, J. Biser, Y. K. Ee, X. Li, N. Tansu, H. M. Chan, and R. P. Vinci, “Dislocation structure of GaN films grown on planar and nano-patterned sapphire,” J. Appl. Phys. 110, 053505 (2011). <pdf>74


  129. X. Li, R. B. Song, Y. K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light Extraction Efficiency and Radiation Patterns of III-Nitride Light-Emitting Diodes with Colloidal Microlens Arrays with Various Aspect Ratios,” IEEE Photon. J. 3, 3, 489 (2011). <pdf>75


  130. N. Tansu, H. P. Zhao, G. Y. Liu, X. Li, J. Zhang, H. Tong, and Y. K. Ee, “Breakthrough in Photonics 2009: III-N Photonics,” IEEE Photon. J. 2, 236 (2010). <pdf>76


  131. X. Li, H. Tong, H. Zhao, and N. Tansu, “Band Structure Calculation of Dilute-As GaNAs by First Principle,” Proc. of the SPIE Photonics West 7597, 75970H1 (2010). <pdf>77


  132. Y. K. Ee, X. Li, J. E. Biser, W. Cao, H. M. Chan, R. P. Vinci, and N. Tansu, “Abbreviated MOVPE Nucleation Studies of III-Nitride Light-Emitting Diodes on Nano-Patterned Sapphire,” J. Crys. Growth 312, 1311 (2010). <pdf>78


  133. H. Zhao, G. Liu, X. Li, R. A. Arif, G. S. Huang, J. D. Poplawsky, S. Tafon Penn, V. Dierolf, and N. Tansu, “Design and Characteristics of Staggered InGaN Quantum Well Light-Emitting Diodes in Green Spectral Regimes” IET Optoelectron. 3, 283 (2009). <pdf>79


  134. H. P. Zhao, G. Y. Liu, X. Li, G. S. Huang, J. D. Poplawsky, S. Tafon Penn, V. Dierolf, and N. Tansu, “Growths of Staggered InGaN Quantum Wells Light-Emitting Diodes Emitting at 520-525 nm Employing Graded Growth-Temperature Profile,” Appl. Phys. Lett. 95, 061104, (2009). <pdf>80


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