Publications

Found 220 results
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2024
Hendricks, N. S., A. E. Islam, E. A. Sowers, J. Williams, D. M. Dryden, K. J. Liddy, W. Wang, J. S. Speck, and A. J. Green, "Current transport mechanisms of metal/TiO2/Beta-Ga2O3 diodes", Journal of Applied Physics, vol. 135, issue 9, 2024.
Rebollo, S., T. Itoh, S. Krishnamoorthy, and J. S. Speck, "Heated-H3PO4 etching of (001) Beta-Ga2O3", Applied Physics Letters, vol. 125, issue 1, 07/2024.
Islam, S., AS. Senarath, E. Farzana, DR. Ball, A. Sengupta, NS. Hendricks, A. Bhattacharyya, RA. Reed, EX. Zhang, JS. Speck, et al., "Single-Event Burnout in Vertical Beta-Ga2O3 Diodes with Pt/PtOx Schottky Contacts and High-k Field-Plate Dielectrics", IEEE Transactions on Nuclear Science, 2024.
2023
Wang, M., F. Wu, Y. Yao, C. Zollner, M. Iza, M. Lam, S. P. DenBaars, S. Nakamura, and J. S. Speck, "10.6% external quantum efficiency germicidal UV-LEDs grown on thin highly conductive n-AlGaN", Applied Physics Letters, vol. 123, issue 23, 2023.
Ewing, J., C. Lynsky, F. Wu, M. Wong, M. Iza, J. S. Speck, and S. P. DenBaars, "6.5% external quantum efficiency in V-defect engineered red InGaN LEDs", Gallium Nitride Materials and Devices XVIII: International Society for Optics and Photonics, 2023.
Itoh, T., A. Mauze, Y. Zhang, and J. S. Speck, "Continuous Si doping in (010) and (001) β-Ga2O3 films by plasma-assisted molecular beam epitaxy", APL Materials, vol. 11, 04, 2023.
Alema, F., T. Itoh, W. Brand, A. Osinsky, and J. S. Speck, "Controllable nitrogen doping of MOCVD Ga2O3 using NH3", Applied Physics Letters, vol. 122, 2023.
Ewing, J. J., C. Lynsky, M. S. Wong, F. Wu, Y. Chao Chow, P. Shapturenka, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "High external quantum efficiency (6.5%) InGaN V-defect LEDs to 600 nm and patterned sapphire substrates", Optics Express, vol. 31, issue 25, pp. 41351-41360, 2023.
Yao, Y., H. Li, M. Wang, P. Li, M. Lam, M. Iza, J. S. Speck, S. P. DenBaars, and S. Nakamura, "High external quantum efficiency (6.8%) UV-A LEDs on AlN templates with quantum barrier optimization", Optics Express, vol. 31, issue 18, pp. 28649-28657, 2023.
Li, P., H. Li, Y. Yao, K. Shek Qwah, M. Iza, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Hybrid tunnel junction enabled independent junction control of cascaded InGaN blue/green micro-light-emitting diodes", Opt. Express, vol. 31, pp. 7572–7578, Feb, 2023.
Li, P., H. Li, Y. Yang, M. S. Wong, M. Iza, M. J. Gordon, J. S. Speck, S. Nakamura, and S. P. DenBaars, "InGaN amber micrometer-scale light-emitting diodes with a peak external quantum efficiency of 5.5%", Applied Physics Express, 2023.
Cadena, R. M., D. R. Ball, E. X. Zhang, S. Islam, A. Senarath, M. W. McCurdy, E. Farzana, J. S. Speck, N. Karom, A. O’Hara, et al., "Low-Energy Ion-Induced Single-Event Burnout in Gallium Oxide Schottky Diodes", IEEE Transactions on Nuclear Science, vol. 70, pp. 363-369, 2023.
Alema, F., T. Itoh, W. Brand, M. Tadjer, A. Osinsky, and J. S. Speck, "N2O grown high Al composition nitrogen doped Beta-(AlGa)2O3/Beta-Ga2O3 using MOCVD", Journal of Vacuum Science and Technology A, vol. 41, issue 4, 2023.
Li, P., H. Li, Y. Yao, N. Lim, M. Wong, M. Iza, M. J. Gordon, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Significant Quantum Efficiency Enhancement of InGaN Red Micro-Light-Emitting Diodes with a Peak External Quantum Efficiency of up to 6%", ACS Photonics, pp. null, 2023.
Islam, S., A. S. Senarath, A. Sengupta, E. Xia Zhang, D. R. Ball, D. M. Fleetwood, R. D. Schrimpf, E. Farzana, A. Bhattacharyya, N. S. Hendricks, et al., "Single-Event Burnout by Cf-252 Irradiation in Vertical Beta-Ga2O3 Diodes with Pt and PtOx Schottky Contacts and High Permittivity Dielectric Field Plate", Device Research Conference (DRC), pp. 1-2, 2023.
Wu, F., J. Ewing, C. Lynsky, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Structure of V-defects in long wavelength GaN-based light emitting diodes", Journal of Applied Physics, vol. 133, 01, 2023.
Wu, F., J. Ewing, C. Lynsky, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Structure of V-defects in long wavelength GaN-based light emitting diodes", Journal of Applied Physics, vol. 133, 01/2023.
Hendricks, N. S., E. Farzana, A. E. Islam, K. D. Leedy, K. J. Liddy, J. Williams, D. M. Dryden, A. M. Adams, J. S. Speck, K. D. Chabak, et al., "Vertical metal-dielectric-semiconductor diode on (001) Beta-Ga2O3 with high-k TiO2 interlayer exhibiting reduced turn-on voltage and leakage current and improved breakdown", Applied Physics Express, vol. 16, issue 7, 2023.
2022
Mauze, A., T. Itoh, Y. Zhang, E. Deagueros, F. Wu, and J. S. Speck, "Coherently strained (001) β-(AlxGa1−x)2O3 thin films on β-Ga2O3: Growth and compositional analysis", Journal of Applied Physics, vol. 132, 09, 2022.
Li, P., H. Li, Y. Yang, H. Zhang, P. Shapturenka, M. Wong, C. Lynsky, M. Iza, M. J. Gordon, J. S. Speck, et al., "Demonstration of ultra-small 5 × 5 μm2 607 nm InGaN amber micro-light-emitting diodes with an external quantum efficiency over 2\%", Applied Physics Letters, vol. 120, 01, 2022.
Alema, F., T. Itoh, S. Vogt, J. S. Speck, and A. Osinsky, "Highly conductive epitaxial β-Ga2O3 and β-(AlxGa1−x)2O3 films by MOCVD", Japanese Journal of Applied Physics, vol. 61, pp. 100903, sep, 2022.
Ewing, J., C. Lynsky, J. Zhang, P. Shapturenka, M. Wong, J. Smith, M. Iza, J. S. Speck, and S. P. DenBaars, "Influence of Superlattice Structure on V-Defect Distribution, External Quantum Efficiency and Electroluminescence for Red InGaN Based µLEDs on Silicon", Crystals, vol. 12, pp. 1216, 2022.
Farzana, E., A. Bhattacharyya, N. S. Hendricks, T. Itoh, S. Krishnamoorthy, and J. S. Speck, "Oxidized metal Schottky contact with high-κ dielectric field plate for low-loss high-power vertical β-Ga2O3 Schottky diodes", APL Materials, vol. 10, 11, 2022.
Yao, Y., C. J. Zollner, M. Wang, M. Iza, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Polarization-Enhanced p-AlGaN Superlattice Optimization for GUV LED", IEEE Journal of Quantum Electronics, vol. 58, pp. 1-9, 2022.
Li, P., H. Li, M. S. Wong, P. Chan, Y. Yang, H. Zhang, M. Iza, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Progress of InGaN-Based Red Micro-Light Emitting Diodes", Crystals, vol. 12, pp. 541, 2022.

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