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Kosuke O. Hara
Kosuke O. Hara
Verified email at yamanashi.ac.jp - Homepage
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Year
Investigation of grain boundaries in BaSi2 epitaxial films on Si (1 1 1) substrates using transmission electron microscopy and electron-beam-induced current technique
M Baba, K Toh, K Toko, N Saito, N Yoshizawa, K Jiptner, T Sekiguchi, ...
Journal of crystal growth 348 (1), 75-79, 2012
1822012
Determination of bulk minority-carrier lifetime in BaSi2 earth-abundant absorber films by utilizing a drastic enhancement of carrier lifetime by post-growth annealing
KO Hara, N Usami, K Nakamura, R Takabe, M Baba, K Toko, T Suemasu
Applied Physics Express 6 (11), 112302, 2013
1272013
Influence of grain size and surface condition on minority-carrier lifetime in undoped n-BaSi2 on Si (111)
R Takabe, KO Hara, M Baba, W Du, N Shimada, K Toko, N Usami, ...
Journal of applied physics 115 (19), 2014
1082014
Investigation of the recombination mechanism of excess carriers in undoped BaSi2 films on silicon
KO Hara, N Usami, K Toh, M Baba, K Toko, T Suemasu
Journal of applied physics 112 (8), 2012
1042012
In-situ heavily p-type doping of over 1020 cm− 3 in semiconducting BaSi2 thin films for solar cells applications
M Ajmal Khan, KO Hara, W Du, M Baba, K Nakamura, M Suzuno, K Toko, ...
Applied physics letters 102 (11), 2013
972013
Molecular beam epitaxy of BaSi2 thin films on Si (001) substrates
K Toh, KO Hara, N Usami, N Saito, N Yoshizawa, K Toko, T Suemasu
Journal of crystal growth 345 (1), 16-21, 2012
772012
Realization of single-phase BaSi2 films by vacuum evaporation with suitable optical properties and carrier lifetime for solar cell applications
KO Hara, Y Nakagawa, T Suemasu, N Usami
Japanese Journal of Applied Physics 54 (7S2), 07JE02, 2015
652015
Analysis of the electrical properties of Cr/n-BaSi2 Schottky junction and n-BaSi2/p-Si heterojunction diodes for solar cell applications
W Du, M Baba, K Toko, KO Hara, K Watanabe, T Sekiguchi, N Usami, ...
Journal of applied physics 115 (22), 2014
592014
Fabrication of single-phase polycrystalline BaSi2 thin films on silicon substrates by vacuum evaporation for solar cell applications
Y Nakagawa, KO Hara, T Suemasu, N Usami
Japanese Journal of Applied Physics 54 (8S1), 08KC03, 2015
472015
Evaluation of minority carrier diffusion length of undoped n-BaSi2 epitaxial thin films on Si (001) substrates by electron-beam-induced-current technique
M Baba, K Watanabe, KO Hara, K Toko, T Sekiguchi, N Usami, ...
Japanese Journal of Applied Physics 53 (7), 078004, 2014
402014
Fabrication and characterization of BaSi2 epitaxial films over 1 µm in thickness on Si (111)
R Takabe, K Nakamura, M Baba, W Du, MA Khan, K Toko, M Sasase, ...
Japanese Journal of Applied Physics 53 (4S), 04ER04, 2014
402014
Photoresponse properties of BaSi2 film grown on Si (100) by vacuum evaporation
CT Trinh, Y Nakagawa, KO Hara, R Takabe, T Suemasu, N Usami
Materials Research Express 3 (7), 076204, 2016
392016
Evaluation of potential variations around grain boundaries in BaSi2 epitaxial films by Kelvin probe force microscopy
M Baba, S Tsurekawa, K Watanabe, W Du, K Toko, KO Hara, N Usami, ...
Applied physics letters 103 (14), 2013
392013
Structural and electrical characterizations of crack-free BaSi2 thin films fabricated by thermal evaporation
KO Hara, J Yamanaka, K Arimoto, K Nakagawa, T Suemasu, N Usami
Thin Solid Films 595, 68-72, 2015
352015
N-type doping of BaSi2 epitaxial films by phosphorus ion implantation and thermal annealing
KO Hara, Y Hoshi, N Usami, Y Shiraki, K Nakamura, K Toko, T Suemasu
Thin Solid Films 557, 90-93, 2014
352014
Formation of metastable cubic phase in SnS thin films fabricated by thermal evaporation
KO Hara, S Suzuki, N Usami
Thin Solid Films 639, 7-11, 2017
342017
Effects of deposition rate on the structure and electron density of evaporated BaSi2 films
KO Hara, CT Trinh, K Arimoto, J Yamanaka, K Nakagawa, Y Kurokawa, ...
Journal of applied physics 120 (4), 2016
332016
Simple method for significant improvement of minority-carrier lifetime of evaporated BaSi2 thin film by sputtered-AlOx passivation
NM Shaalan, KO Hara, CT Trinh, Y Nakagawa, N Usami
Materials Science in Semiconductor Processing 76, 37-41, 2018
312018
Potential variations around grain boundaries in impurity-doped BaSi2 epitaxial films evaluated by Kelvin probe force microscopy
D Tsukahara, M Baba, S Honda, Y Imai, KO Hara, N Usami, K Toko, ...
Journal of applied physics 116 (12), 2014
312014
Structural study of BF2 ion implantation and post annealing of BaSi2 epitaxial films
KO Hara, N Usami, Y Hoshi, Y Shiraki, M Suzuno, K Toko, T Suemasu
Japanese Journal of Applied Physics 50 (12R), 121202, 2011
302011
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