Publications

Found 209 results
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2021
Speck, J. S., "Materials progress for the development of beta-Ga2O3 for power electronics", Oxide-based Materials and Devices XII: International Society for Optics and Photonics, 2021.
Mauze, A., T. Itoh, Y. Zhang, and J. S. Speck, "Sn doping of [beta]-Ga2O3 grown by plasma-assisted molecular beam epitaxy", Oxide-based Materials and Devices XII: International Society for Optics and Photonics, 2021.
Farzana, E., F. Alema, W. Ying Ho, A. Mauze, T. Itoh, A. Osinsky, and J. S. Speck, "Vertical β-Ga2O3 Schottky diodes from metal-organic chemical vapor deposition with low on-resistance and high average breakdown field", Oxide-based Materials and Devices XII: International Society for Optics and Photonics, 2021.
2019
Feneberg, M., C. Lidig, M. E. White, M. Y. Tsai, J. S. Speck, O. Bierwagen, Z. Galazka, and R. Goldhahn, "Anisotropic optical properties of highly doped rutile SnO2: Valence band contributions to the Burstein-Moss shift", APL Materials, vol. 7, pp. 022508, 2019.
2018
Neal, A. T., S. Mou, S. Rafique, H. Zhao, E. Ahmadi, J. S. Speck, K. T. Stevens, J. D. Blevins, D. B. Thomson, N. Moser, et al., "Donors and deep acceptors in β-Ga2O3", Applied Physics Letters, vol. 113, pp. 062101, 2018.
2017
Megalini, L., B. Bonef, B. C. Cabinian, H. Zhao, A. Taylor, J. S. Speck, J. E. Bowers, and J. Klamkin, "1550-nm InGaAsP multi-quantum-well structures selectively grown on v-groove-patterned SOI substrates", Applied Physics Letters, vol. 111, no. 3: AIP Publishing, pp. 032105, 2017.
Rigutti, L., B. Bonef, J. Speck, F. Tang, and RA. Oliver, "Atom probe tomography of nitride semiconductors", Scripta Materialia: Pergamon, 2017.
Alema, F., B. Hertog, A. V. Osinsky, P. Mukhopadhyay, M. Toporkov, W. V. Schoenfeld, E. Ahmadi, and J. Speck, "Vertical solar blind Schottky photodiode based on homoepitaxial Ga 2 O 3 thin film", Oxide-based Materials and Devices VIII, vol. 10105: International Society for Optics and Photonics, pp. 101051M, 2017.
2016
Tsai, M-Y., O. Bierwagen, and J. S. Speck, "Epitaxial Sb-doped SnO2 and Sn-doped In2O3 transparent conducting oxide contacts on GaN-based light emitting diodes", Thin Solid Films, vol. 605: Elsevier, pp. 186–192, 2016.
2015
Korhonen, E., V. Prozheeva, F. Tuomisto, O. Bierwagen, JS. Speck, ME. White, Z. Galazka, H. Liu, N. Izyumskaya, V. Avrutin, et al., "Cation vacancies and electrical compensation in Sb-doped thin-film SnO2 and ZnO", Semiconductor Science and Technology, vol. 30, no. 2: IOP Publishing, pp. 024011, 2015.
Zhong, H., A. Tyagi, K. J. Vampola, J. S. Speck, S. P. DenBaars, and S. Nakamura, High light extraction efficiency nitride based light emitting diode by surface roughening, 2015.
Ahmadi, E., F. Wu, H. Li, S. W. Kaun, M. Tahhan, K. Hestroffer, S. Keller, J. S. Speck, and U. K. Mishra, "N-face GaN/AlN/GaN/InAlN and GaN/AlN/AlGaN/GaN/InAlN high-electron-mobility transistor structures grown by plasma-assisted molecular beam epitaxy on vicinal substrates", Semiconductor Science and Technology, vol. 30, no. 5: IOP Publishing, pp. 055012, 2015.
Hsu, P. Shan, K. M. Kelchner, R. M. Farrell, D. A. Haeger, H. Ohta, A. Tyagi, S. Nakamura, S. P. DenBaars, and J. S. Speck, Semi-polar iii-nitride optoelectronic devices on m-plane substrates with miscuts less than+/-15 degrees in the c-direction, 2015.
Ohta, H., F. Wu, A. Tyagi, A. Chakraborty, J. S. Speck, S. P. DenBaars, S. Nakamura, and E. C. Young, Semipolar or nonpolar nitride-based devices on partially or fully relaxed alloys with misfit dislocations at the heterointerface, 2015.
2014
Ohta, H., F. Wu, A. Tyagi, A. Chakraborty, J. S. Speck, S. P. DenBaars, S. Nakamura, and E. C. Young, Anisotropic strain control in semipolar nitride quantum wells by partially or fully relaxed aluminum indium gallium nitride layers with misfit dislocations, 2014.
Feneberg, M., C. Lidig, K. Lange, M. E. White, M. Y. Tsai, J. S. Speck, O. Bierwagen, and R. Goldhahn, "Anisotropy of the electron effective mass in rutile SnO2 determined by infrared ellipsometry", physica status solidi (a), vol. 211, no. 1: Wiley Online Library, pp. 82–86, 2014.
Korhonen, E., F. Tuomisto, O. Bierwagen, JS. Speck, and Z. Galazka, "Compensating vacancy defects in Sn-and Mg-doped In 2 O 3", Physical Review B, vol. 90, no. 24: American Physical Society, pp. 245307, 2014.
Mogilatenko, A., H. Kirmse, O. Bierwagen, M. Schmidbauer, M-Y. Tsai, I. Häusler, M. E. White, and J. S. Speck, "Effect of heavy Ga doping on defect structure of SnO2 layers", physica status solidi (a), vol. 211, no. 1: Wiley Online Library, pp. 87–92, 2014.
Linez, F., M. Ritt, C. Rauch, L. Kilanski, S. Choi, J. Räisänen, JS. Speck, and F. Tuomisto, "He implantation induced defects in InN", Journal of Physics: Conference Series, vol. 505, no. 1: IOP Publishing, pp. 012012, 2014.
Watanabe, K., T. Ohsawa, I. Sakaguchi, O. Bierwagen, M. E. White, M-Y. Tsai, R. Takahashi, E. M. Ross, Y. Adachi, J. S. Speck, et al., "Investigation of charge compensation in indium-doped tin dioxide by hydrogen insertion via annealing under humid conditions", Applied Physics Letters, vol. 104, no. 13: AIP, pp. 132110, 2014.
Watanabe, K., T. Ohsawa, I. Sakaguchi, O. Bierwagen, M. E. White, M-Y. Tsai, R. Takahashi, E. M. Ross, Y. Adachi, J. S. Speck, et al., "Investigation of charge compensation in indium-doped tin dioxide by hydrogen insertion via annealing under humid conditions", Applied Physics Letters, vol. 104, no. 13: AIP, pp. 132110, 2014.
Speck, J. S., A. Tyagi, S. P. DenBaars, and S. Nakamura, Limiting strain relaxation in III-nitride hetero-structures by substrate and epitaxial layer patterning, 2014.
Feneberg, M., C. Lidig, K. Lange, R. Goldhahn, M. D. Neumann, N. Esser, O. Bierwagen, M. E. White, M. Y. Tsai, and J. S. Speck, "Ordinary and extraordinary dielectric functions of rutile SnO2 up to 20 eV", Applied Physics Letters, vol. 104, no. 23: AIP, pp. 231106, 2014.
Korhonen, E., F. Tuomisto, O. Bierwagen, JS. Speck, ME. White, and Z. Galazka, "Vacancy complexes in Sb-doped SnO 2", AIP Conference Proceedings, vol. 1583, no. 1: AIP, pp. 368–371, 2014.
Prozheeva, V., F. Tuomisto, G. Koblmüller, J. S. Speck, A. Knübel, and R. Aidam, "Vacancy defect formation in PA-MBE grown C-doped InN", physica status solidi (c), vol. 11, no. 3-4: Wiley Online Library, pp. 530–532, 2014.

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