Výsledky vyhledávání - "A. X. Levander"

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Autor: A. X. Levander, Kin Man Yu, R. dos Reis, Junqiao Wu, Wladek Walukiewicz, Sergei V. Novikov, Oscar D. Dubon, C. T. Foxon, Zuzanna Liliental-Weber

Publikováno v: physica status solidi c. 10:453-456

Transmission Electron Microscopy of Mg doped GaN1-xAsx samples, grown by MBE at low temperatures, show substantial structural changes for samples that are semi-insulating and those with high or low conductivity. The conductive samples show p-type con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb940304d2e82f79a58b7a3a32bf1109
https://doi.org/10.1002/pssc.201200666

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Structural studies of GaN 1‐x As x and GaN 1‐x Bi x alloys for solar cell applications

Autor: Wladek Walukiewicz, R. dos Reis, Sergei V. Novikov, Zuzanna Liliental-Weber, Kin Man Yu, A. X. Levander, C. T. Foxon

Publikováno v: physica status solidi c. 9:1586-1589

We have discovered materials with a wide tunability of the band gap that opens the possibility to achieve a desirable material for multi-junction solar cells. Two different alloy systems have been studied. GaN1-xAsx alloys over the entire composition

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e202b24d1d38e6e230aa4f066d64a7e
https://doi.org/10.1002/pssc.201100582

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Wurtzite-to Amorphous-to Cubic Phase Transition of GaN1-XAsx Alloys with Increasing as Content

Autor: A. X. Levander, Sergei V. Novikov, Kin Man Yu, Wladek Walukiewicz, Zuzanna Liliental-Weber, C. T. Foxon, R. dos Reis

Publikováno v: Solid State Phenomena. 186:74-77

This paper describes Transmission Electron Microscopy studies of the structural changes of GaN1-xAsx alloys grown by Molecular Beam Epitaxy at low temperatures on Al2O3 substrate. We found that by lowering the growth temperature increasing amount of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba3c29a2a07a016bb24127d6165e4ef0
https://doi.org/10.4028/www.scientific.net/ssp.186.74

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Growth and transport properties of p-type GaNBi alloys

Autor: Roberto dos Reis, Jonathan D. Denlinger, Zuzanna Liliental-Weber, Kin Man Yu, Junqiao Wu, Wladek Walukiewicz, Oscar D. Dubon, Sergei V. Novikov, C. T. Foxon, A. X. Levander

Publikováno v: Journal of Materials Research. 26:2887-2894

Thin films of GaNBi alloys with up to 12.5 at.% Bi were grown on sapphire using low-temperature molecular beam epitaxy. The low growth temperature and incorporation of Bi resulted in a morphology of nanocrystallites embedded in an amorphous matrix. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9410d6c4a31bef65951d14a90fbb6c2
https://doi.org/10.1557/jmr.2011.376

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In situ stress measurement for MOVPE growth of high efficiency lattice-mismatched solar cells

Autor: A. X. Levander, John F. Geisz, Kim M. Jones, Andrew G. Norman, Manuel J. Romero

Publikováno v: Journal of Crystal Growth. 310:2339-2344

We have recently reported high efficiencies in a monolithic III-V triple-junction solar cell design that is grown inverted with a metamorphic 1.0 eV bottom In{sub .27}Ga{sub .73}As junction. The biaxial stress and strain grown into this highly lattic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e86d25c038a72077dccdf54412665452
https://doi.org/10.1016/j.jcrysgro.2007.11.048

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Electrothermally driven current vortices in inhomogeneous bipolar semiconductors

Autor: Rui Zhang, A. X. Levander, Deyi Fu, Junqiao Wu, Joel W. Ager

Publikováno v: Physical Review B. 84

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a45b4644311ffcd73fd44f537f9aaf83
https://doi.org/10.1103/physrevb.84.045205

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Development of intermediate band solar cell based on ZnTe1−xOx synthesized by oxygen ion implantation

Autor: N. Lopez, Kin Man Yu, Mitsuhiro Nishio, Wladek Walukiewicz, Lothar A. Reichertz, Tooru Tanaka, Oscar D. Dubon, A. X. Levander

Publikováno v: 2011 37th IEEE Photovoltaic Specialists Conference.

Optical properties of ZnTe 1−x O x (ZnTeO) and evidence for the photovoltaic (PV) activity of a ZnTeO intermediate band solar cell (IBSC) are reported. Electron transitions from the intermediate band to the conduction band were observed by photomod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ceabad5b0dcb989d746958aed800e90d
https://doi.org/10.1109/pvsc.2011.6186368

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Akademický článek

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Local structure of amorphous GaN1−xAsx semiconductor alloys across the composition range

Autor: Zuzanna Liliental-Weber, Sergei V. Novikov, Kin Man Yu, Junqiao Wu, Wladek Walukiewicz, Oscar D. Dubon, C. T. Foxon, A. X. Levander

Publikováno v: Journal of Applied Physics. 113:243505

Typically only dilute (up to ∼10%) highly mismatched alloys can be grown due to the large differences in atomic size and electronegativity of the host and the alloying elements. We have overcome the miscibility gap of the GaN1−xAsx system using l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1a847b31ce9cf62c6e9a5136007b28e
https://doi.org/10.1063/1.4812277

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