Publications

Found 217 results
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2012
Pan, C-C., S. Tanaka, F. Wu, Y. Zhao, J. S. Speck, S. Nakamura, S. P. DenBaars, and D. Feezell, "High-power, low-efficiency-droop semipolar (2021) single-quantum-well blue light-emitting diodes", Applied Physics Express, vol. 5, no. 6: IOP Publishing, pp. 062103, 2012.
Farrell, R. M., C. J. Neufeld, N. G. Toledo, S. P. DenBaars, U. K. Mishra, J. S. Speck, and S. Nakamura, Iii-nitride flip-chip solar cells, jul # " 19", 2012.
Zhao, Y., Q. Yan, C-Y. Huang, S-C. Huang, P. Shan Hsu, S. Tanaka, C-C. Pan, Y. Kawaguchi, K. Fujito, C. G. Van de Walle, et al., "Indium incorporation and emission properties of nonpolar and semipolar InGaN quantum wells", Applied Physics Letters, vol. 100, no. 20: AIP, pp. 201108, 2012.
Farahani, SK. Vasheghani, TD. Veal, AM. Sanchez, O. Bierwagen, ME. White, S. Gorfman, PA. Thomas, JS. Speck, and CF. McConville, "Influence of charged-dislocation density variations on carrier mobility in heteroepitaxial semiconductors: The case of SnO 2 on sapphire", Physical Review B, vol. 86, no. 24: American Physical Society, pp. 245315, 2012.
Pan, C-C., T. Gilbert, N. Pfaff, S. Tanaka, Y. Zhao, D. Feezell, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Reduction in thermal droop using thick single-quantum-well structure in semipolar (2021) blue light-emitting diodes", Applied Physics Express, vol. 5, no. 10: IOP Publishing, pp. 102103, 2012.
Zhao, Y., C-Y. Huang, S. Tanaka, C-C. Pan, K. Fujito, D. Feezell, J. S. Speck, S. DenBaars, and S. Nakamura, "Semipolar (20-2-1) Blue and Green InGaN Light-Emitting Diodes", CLEO: Applications and Technology: Optical Society of America, pp. JTh4J–2, 2012.
Zhong, H., A. Tyagi, J. Stephen Speck, S. P. DenBaars, and S. Nakamura, Thin p-type gallium nitride and aluminum gallium nitride electron-blocking layer free gallium nitride-based light emitting diodes, 2012.
Speck, J. S., A. Tyagi, A. E. Romanov, S. Nakamura, and S. P. DenBaars, Vicinal semipolar iii-nitride substrates to compensate tilt of relaxed hetero-epitaxial layers, 2012.
2011
Prosa, TJ., PH. Clifton, H. Zhong, A. Tyagi, R. Shivaraman, SP. DenBaars, S. Nakamura, and JS. Speck, "Atom probe analysis of interfacial abruptness and clustering within a single In x Ga 1- x N quantum well device on semipolar (10 1\= 1\=) GaN substrate", Applied physics letters, vol. 98, no. 19: AIP, pp. 191903, 2011.
Romanov, A. E., E. C. Young, F. Wu, A. Tyagi, C. S. Gallinat, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Basal plane misfit dislocations and stress relaxation in III-nitride semipolar heteroepitaxy", Journal of Applied Physics, vol. 109, no. 10: AIP, pp. 103522, 2011.
Hsu, P. Shan, J. Sonoda, K. M. Kelchner, A. Tyagi, R. M. Farrell, D. A. Haeger, E. C. Young, A. E. Romanov, K. Fujito, H. Ohta, et al., "Blue InGaN/GaN laser diodes grown on (33$$\backslash$bar 3$\backslash$bar 1$) free-standing GaN substrates", physica status solidi (c), vol. 8, no. 7-8: WILEY-VCH Verlag, pp. 2390–2392, 2011.
Simeonov, D., MY. Tsai, HT. Chen, C. Weisbuch, and J. Speck, "Bonding of nitride based LEDs on tin oxide templates for advanced optoelectronic devices", Electronics Letters, vol. 47, no. 9: IET, pp. 556–558, 2011.
Singisetti, U., M. Hoi Wong, S. Dasgupta, B. Swenson, B. J. Thibeault, J. S. Speck, U. K. Mishra, and others, "Enhancement-mode N-polar GaN MISFETs with self-aligned source/drain regrowth", IEEE Electron Device Letters, vol. 32, no. 2: IEEE, pp. 137–139, 2011.
Zhao, Y., S. Tanaka, Q. Yan, C-Y. Huang, R. B. Chung, C-C. Pan, K. Fujito, D. Feezell, C. G. Van de Walle, J. S. Speck, et al., "High optical polarization ratio from semipolar (20 2\= 1\=) blue-green InGaN/GaN light-emitting diodes", Applied physics letters, vol. 99, no. 5: AIP, pp. 051109, 2011.
Zhao, Y., S. Tanaka, R. Chung, C-C. Pan, K. Fujito, D. Feezell, J. Speck, S. DenBaars, and S. Nakamura, "Highly Polarized Spontaneous Emission from Semipolar(20-2-1) InGaN/GaN Light-Emitting Diodes", Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States.[np]. Jun: Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States, 2011.
Zhao, Y., S. Tanaka, C-C. Pan, K. Fujito, D. Feezell, J. S. Speck, S. P. DenBaars, and S. Nakamura, "High-power blue-violet semipolar (2021) InGaN/GaN light-emitting diodes with low efficiency droop at 200 A/cm2", Applied physics express, vol. 4, no. 8: IOP Publishing, pp. 082104, 2011.
Ťapajna, M., SW. Kaun, MH. Wong, F. Gao, T. Palacios, UK. Mishra, JS. Speck, and M. Kuball, "Influence of threading dislocation density on early degradation in AlGaN/GaN high electron mobility transistors", Applied Physics Letters, vol. 99, no. 22: AIP, pp. 223501, 2011.
Toledo, N. G., S. C. Cruz, C. J. Neufeld, J. R. Lang, M. A. Scarpulla, T. Buehl, A. C. Gossard, S. P. DenBaars, J. S. Speck, and U. K. Mishra, "Integrated non-III-nitride/III-nitride tandem solar cell", Device Research Conference (DRC), 2011 69th Annual: IEEE, pp. 265–266, 2011.
Wu, F., A. Tyagi, EC. Young, AE. Romanov, K. Fujito, SP. DenBaars, S. Nakamura, and JS. Speck, "Misfit dislocation formation at heterointerfaces in (Al, In) GaN heteroepitaxial layers grown on semipolar free-standing GaN substrates", Journal of Applied Physics, vol. 109, no. 3: AIP, pp. 033505, 2011.
Gao, F., B. Lu, L. Li, S. Kaun, J. S. Speck, C. V. Thompson, and T. Palacios, "Role of oxygen in the OFF-state degradation of AlGaN/GaN high electron mobility transistors", Applied Physics Letters, vol. 99, no. 22: AIP, pp. 223506, 2011.
Tyagi, A., R. M. Farrell, C-Y. Huang, P. Shan Hsu, D. A. Haeger, K. M. Kelchner, H. Ohta, S. Nakamura, S. P. DenBaars, and J. S. Speck, Semipolar iii-nitride laser diodes with etched mirrors, 2011.
Toledo, N., C. Neufeld, M. Scarpulla, T. Buehl, S. Cruz, A. Gossard, S. DenBaars, J. Speck, and U. Mishra, "Wafer Bonded GaAs-Sapphire for Photovoltaic Applications via Adhesive Bonding", Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States.[np]. Jun: Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States, 2011.
Nagata, T., O. Bierwagen, ME. White, MY. Tsai, Y. Yamashita, H. Yoshikawa, N. Ohashi, K. Kobayashi, T. Chikyow, and JS. Speck, "XPS study of Sb-/In-doping and surface pinning effects on the Fermi level in SnO 2 (101) thin films", Applied Physics Letters, vol. 98, no. 23: AIP, pp. 232107, 2011.
2010
Tyagi, A., R. M. Farrell, K. M. Kelchner, C.-Y. Huang, P. S. Hsu, D. A. Haeger, M. T. Hardy, C. Holder, K. Fujito, D. A. Cohen, et al., "AlGaN-Cladding Free Green Semipolar GaN Based Laser Diode with a Lasing Wavelength of 506.4 nm", Applied Physics Express, vol. 3, pp. 011002, 2010.
Young, E. C., C. S. Gallinat, A. E. Romanov, A. Tyagi, F. Wu, and J. S. Speck, "Critical thickness for onset of plastic relaxation in (1122) and (2021) semipolar AlGaN heterostructures", Applied physics express, vol. 3, no. 11: IOP Publishing, pp. 111002, 2010.

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