Zobrazeno 1 - 10
of 18
pro vyhledávání: '"A. X. Levander"'
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
https://doi.org/10.1002/pssc.201200666
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
https://doi.org/10.1002/pssc.201100582
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
https://doi.org/10.4028/www.scientific.net/ssp.186.74
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
https://doi.org/10.1557/jmr.2011.376
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
https://doi.org/10.1016/j.jcrysgro.2007.11.048
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
https://doi.org/10.1103/physrevb.84.045205
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
https://doi.org/10.1109/pvsc.2011.6186368
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
https://doi.org/10.1063/1.4812277
Autor:
Robert W. Martin, M. Shaw, Wladek Walukiewicz, D. Detert, Stefan P. Svensson, Wendy L. Sarney, Sergei V. Novikov, Zuzanna Liliental-Weber, Kin Man Yu, C. T. Foxon, A. X. Levander
Publikováno v:
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena. 31:03C102
GaN materials alloyed with group V anions form the so-called highly mismatched alloys (HMAs). Recently, the authors succeeded in growing N-rich GaN1−xAsx and GaN1−xBix alloys over a large composition range by plasma-assisted molecular beam epitax
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e863e71aa34ccb89ec0657be6672a618
https://doi.org/10.1116/1.4774028
https://doi.org/10.1116/1.4774028
Autor:
Jingyu Lin, William J. Schaff, B. N. Pantha, Ian T. Ferguson, Rui Zhang, Bin Liu, A. X. Levander, Hongxing Jiang, Trong Tong, David G. Cahill, Deyi Fu, Na Lu, Junqiao Wu
Publikováno v:
Applied Physics Letters. 102:121906
We have systematically measured the room-temperature thermal conductivity of epitaxial layers of InxGa1−xN alloys with 15 different Indium compositions ranging from 0.08 to 0.98 by time-domain thermoreflectance method. The data are compared to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93b059eda4f3bca267531b60934a3594
https://doi.org/10.1063/1.4798838
https://doi.org/10.1063/1.4798838