Search Results - "Ohdaira, K."

Formation of micrometer-order-thick poly-Si films on textured glass substrates by flash lamp annealing of a-Si films prepared by catalytic chemical vapor deposition by Ohdaira, K., Fujiwara, T., Endo, Y., Nishioka, K., Matsumura, H.

“…We investigate the microstructures of polycrystalline silicon (poly-Si) films formed by flash lamp annealing (FLA) of 4.5-μm-thick precursor a-Si films…”
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Characterization of Cu doped CdSe thin films grown by vacuum evaporation by Ramaiah, K.Subba, Su, Y.K., Chang, S.J., Juang, F.S., Ohdaira, K., Shiraki, Y., Liu, H.P., Chen, I.G., Bhatnagar, A.K.

“…Cu doped CdSe thin films have been successfully grown by vacuum evaporation technique at various substrate temperatures. XRD analysis revealed that the films…”
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Control of type-I and type-II band alignments in AlInAs/AlGaAs self-assembled quantum dots by changing AlGaAs compositions by Ohdaira, K, Murata, H, Koh, S, Baba, M, Akiyama, H, Ito, R, Shiraki, Y

“…Type-I and type-II band alignments were successfully controlled by changing composition and growth temperature in AlInAs/AlGaAs self-assembled quantum dots…”
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Observation of negatively charged excitons and excited states of multi-excitons in quantum dots embedded in modulation doping structures by Ohdaira, K., Usami, N., Ota, K., Shiraki, Y.

“…Existence of negatively charged excitons in quantum dots (QDs) is confirmed by the measurement of the bias dependence of luminescence from modulation doped…”
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Exciton recombination process in GaAs/AlAs type-II heterostructures in pulsed high magnetic fields and a uniaxial pressure by Ono, K, Uchida, K, Miura, N, Hirayama, Y, Ohdaira, K, Shiraki, Y

“…We measured magneto-photoluminescence (PL) spectra in type-II heterostructures of GaAs/AlAs in high magnetic fields up to 40 T under a uniaxial pressure. We…”
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Comparison of a-Si TFTs fabricated by Cat-CVD and PECVD methods by Nishizaki, Shogo, Ohdaira, Keisuke, Matsumura, Hideki

“…We investigate the characteristics of amorphous silicon thin film transistors (a-Si TFTs) fabricated by plasma-enhanced chemical vapor deposition (PECVD) and…”
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New application of Cat-CVD technology and recent status of industrial implementation by Matsumura, Hideki, Ohdaira, Keisuke

“…Recent progress in application of Cat-CVD (Hot Wire CVD) technology is overviewed, along with recent status of industrial implementation of this technology…”
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A novel patterning technique using super-hydrophobic PTFE thin films by Cat-CVD method by Takachi, Michihisa, Yasuoka, Hiroaki, Ohdaira, Keisuke, Shimoda, Tatsuya, Matsumura, Hideki

“…Super-hydrophobic poly-tetrafluoroethylene (PTFE) films, with a water contact angle of over 160°, are formed by catalytic chemical vapor deposition (Cat-CVD)…”
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Precursor Cat-CVD a-Si films for the formation of high-quality poly-Si films on glass substrates by flash lamp annealing by Ohdaira, Keisuke, Shiba, Kazuhiro, Takemoto, Hiroyuki, Fujiwara, Tomoko, Endo, Yohei, Nishizaki, Shogo, Jang, Young Rae, Matsumura, Hideki

“…Amorphous Si (a-Si) films with lower hydrogen contents show better adhesion to glass during flash lamp annealing (FLA). The 2.0 µm-thick a-Si films deposited…”
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Formation of polycrystalline silicon films with μm-order-long grains through liquid-phase explosive crystallization by flash lamp annealing by Ohdaira, K., Varlamov, S., Usami, N., Matsumura, H.

“…Flash lamp annealing (FLA) is a short-time annealing technique which can heat and crystallize μm-order-thick amorphous silicon (a-Si) films without inducing…”
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Solar cell system using a polished concave Si-crystal mirror by Nakajima, Kazuo, Ohdaira, Keisuke, Fujiwara, Kozo, Pan, Wugen

“…We demonstrated a solar cell system comprising a concave-Si-mirror solar cell and a conventional small Si solar cell set at the focal point of the…”
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Carrier recombination mechanisms in solar cells fabricated using flash-lamp-crystallized polycrystalline silicon films by Ohdaira, K., Ishii, S., Tomura, N., Matsumura, H.

“…Flash lamp annealing (FLA), millisecond-order discharge from a Xe lamp array, can form a few μm-thick polycrystalline silicon (poly-Si) films on low-cost glass…”
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Surface treatment of crystalline silicon realizing extremely low surface recombination velocity using catalytically generated radicals by Ohdaira, K, Miyamoto, M, Koyama, K, Matsumura, H

“…The surface recombination velocities (SRVs) of minority carriers on crystalline silicon (c-Si) surfaces are remarkably reduced by applying radical treatment at…”
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Influence of stacked Ge islands on the dark current–voltage characteristics and the conversion efficiency of the solar cells by Alguno, Arnold, Usami, Noritaka, Ohdaira, Keisuke, Pan, Wugen, Tayanagi, Misumi, Nakajima, Kazuo

“…The dark current–voltage ( J– V) characteristics and the conversion efficiency of the solar cells with embedded stacked Ge islands in the intrinsic layer were…”
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Improved performance of thin-film solar cells using surface-morphology-controlled poly-Si films crystallized by flash lamp annealing by Ohdaira, K., Takemoto, H., Shiba, K., Nishikawa, T., Koyama, K., Matsumura, H.

“…We improve the performance of thin-film solar cells using polycrystalline silicon (poly-Si) films formed by flash lamp annealing (FLA) of precursor amorphous…”
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High-Efficiency Concave and Conventional Solar Cell Integration System Using Focused Reflected Light by Ohdaira, Keisuke, Fujiwara, Kozo, Pan, Wugen, Usami, Noritaka, Nakajima, Kazuo

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Magneto-photoluminescence Studies of AlInAs/AlGaAs Self-assembled Quantum Dots with Type-II Band Alignment by Ohdaira, Keisuke, Ono, Kazuo, Uchida, Kazuhito, Koh, Shinji, Miura, Noboru, Shiraki, Yasuhiro

“…Magnetic-field dependence of the photoluminescence (PL) characteristic of type-II quantum dots (QDs) was observed in AlInAs/AlGaAs self-assembled QDs…”
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Observation of band alignment transition from type-I to type-II in AlInAs/AlGaAs self-assembled quantum dots by OHDAIRA, Keisuke, MURATA, Hiroshi, KOH, Shinji, BABA, Motoyoshi, AKIYAMA, Hidefumi, ITO, Ryoichi, SHIRAKI, Yasuhiro

“…We found that the AlInAs/AlGaAs self-assembled quantum dots (QDs) systematically changed from type-I to type-II band alignment in real and momentum space with…”
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Analysis of the Dark-Current Density in Solar Cells Based on Multicrystalline SiGe by Ohdaira, Keisuke, Usami, Noritaka, Pan, Wugen, Fujiwara, Kozo, Nakajima, Kazuo

“…We analyzed the dark-current density obtained from solar cells based on multicrystalline SiGe (mc-SiGe) using a modified two-diode model that includes two…”
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Floating Zone Growth of Si Bicrystals Using Seed Crystals with Artificially Designed Grain Boundary Configuration by Usami, Noritaka, Kitamura, Masayuki, Sugawara, Takamasa, Kutsukake, Kentaro, Ohdaira, Keisuke, Nose, Yoshitaro, Fujiwara, Kozo, Shishido, Toetsu, Nakajima, Kazuo

“…We attempted to grow Si bicrystals with a controlled grain boundary configuration using a pair of single-crystal seeds, which was purposely designed to have a…”
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