Search Results - "Hara, Kohjiro"

Visible-Light-Induced Water Splitting Based on Two-Step Photoexcitation between Dye-Sensitized Layered Niobate and Tungsten Oxide Photocatalysts in the Presence of a Triiodide/Iodide Shuttle Redox Mediator by Abe, Ryu, Shinmei, Kenichi, Koumura, Nagatoshi, Hara, Kohjiro, Ohtani, Bunsho

“…Water splitting into H2 and O2 under visible light was achieved using simple organic dyes such as coumarin and carbazole as photosensitizers on an n-type…”
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Spectroscopic investigation of long-term outdoor-exposed crystalline silicon photovoltaic modules by Hara, Kohjiro, Chiba, Yasuo

“…Degradations of the encapsulants in long-term outdoor-exposed crystalline silicon photovoltaic modules were investigated by spectroscopy measurements. [Display…”
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Hexylthiophene-Functionalized Carbazole Dyes for Efficient Molecular Photovoltaics: Tuning of Solar-Cell Performance by Structural Modification by Wang, Zhong-Sheng, Koumura, Nagatoshi, Cui, Yan, Takahashi, Masabumi, Sekiguchi, Hiroki, Mori, Atsunori, Kubo, Toshitaka, Furube, Akihiro, Hara, Kohjiro

“…Novel organic dyes (MK dyes), which have a carbazole derivative as an electron donor and a cyanoacrylic acid moiety (C(CN)COOH) as an electron acceptor and…”
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Ultrafast plasmon induced electron injection mechanism in gold–TiO2 nanoparticle system by Du, Luchao, Furube, Akihiro, Hara, Kohjiro, Katoh, Ryuzi, Tachiya, Masanori

“…► Plasmon-induced charge transfer in gold–TiO2 nanoparticle systems was revealed. ► Electron injection into TiO2 was within 50fs with the efficiency of…”
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Alkyl-Functionalized Organic Dyes for Efficient Molecular Photovoltaics by Koumura, Nagatoshi, Wang, Zhong-Sheng, Mori, Shogo, Miyashita, Masanori, Suzuki, Eiji, Hara, Kohjiro

“…We designed and synthesized new alkyl-functionalized organic dyes, MK-1 and MK-2, for dye-sensitized solar cells (DSSCs). Based on the MK-2 dye, a high…”
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Thiophene-Functionalized Coumarin Dye for Efficient Dye-Sensitized Solar Cells:  Electron Lifetime Improved by Coadsorption of Deoxycholic Acid by Wang, Zhong-Sheng, Cui, Yan, Dan-oh, Yasufumi, Kasada, Chiaki, Shinpo, Akira, Hara, Kohjiro

“…This paper reports a new coumarin dye, 2-cyano-3-(5-{2-[5-(1,1,6,6-tetramethyl-10-oxo-2,3,5,6-tetrahydro-1H ,4H,10H-11-oxa-3a-aza-benzo[de]anthracen…”
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Femtosecond Visible-to-IR Spectroscopy of TiO2 Nanocrystalline Films: Elucidation of the Electron Mobility before Deep Trapping by Tamaki, Yoshiaki, Hara, Kohjiro, Katoh, Ryuzi, Tachiya, M, Furube, Akihiro

“…The transient absorption of nanocrystalline TiO2 films in the visible-to-IR wavelength region was measured under UV excitation at 266 nm in order to purposely…”
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Interfacial Electron-Transfer Kinetics in Metal-Free Organic Dye-Sensitized Solar Cells: Combined Effects of Molecular Structure of Dyes and Electrolytes by Miyashita, Masanori, Sunahara, Kenji, Nishikawa, Tomohiro, Uemura, Yu, Koumura, Nagatoshi, Hara, Kohjiro, Mori, Atsunori, Abe, Takao, Suzuki, Eiji, Mori, Shogo

“…Electron diffusion coefficient, lifetime, and density in the TiO2 electrode of dye-sensitized TiO2 solar cells (DSCs) employing I−/I3 − redox couples were…”
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Molecular Design of Coumarin Dyes for Stable and Efficient Organic Dye-Sensitized Solar Cells by Wang, Zhong-Sheng, Cui, Yan, Dan-oh, Yasufumi, Kasada, Chiaki, Shinpo, Akira, Hara, Kohjiro

“…A series of coumarin dyes (NKX-2593, NKX-2807, and NKX-2883) with one or two -CN groups as electron acceptors were synthesized and applied as dye sensitizers…”
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Electron injection dynamics in dye-sensitized semiconductor nanocrystalline films by FURUBE, Akihiro, KATOH, Ryuzi, HARA, Kohjiro

“…We have summarized recent ultrafast spectroscopic studies on phenomena associated with dye-sensitization of semiconductor metal oxide nanoparticles, especially…”
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Organic Dyes Containing Thieno[3,2-b]indole Donor for Efficient Dye-Sensitized Solar Cells by Zhang, Xue-Hua, Cui, Yan, Katoh, Ryuzi, Koumura, Nagatoshi, Hara, Kohjiro

“…Three new organic dyes, comprising thieno[3,2-b]indole moiety as an electron donor, n-hexyl substituted oligothiophene units as a π-conjugated bridge, and…”
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Direct Observation of Reactive Trapped Holes in TiO2 Undergoing Photocatalytic Oxidation of Adsorbed Alcohols:  Evaluation of the Reaction Rates and Yields by Tamaki, Yoshiaki, Furube, Akihiro, Murai, Miki, Hara, Kohjiro, Katoh, Ryuzi, Tachiya, M

“…To investigate the primary process of photocatalytic oxidation of TiO2, interfacial charge-transfer reaction of trapped holes formed in nanocrystalline TiO2…”
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Oligothiophene-Containing Coumarin Dyes for Efficient Dye-Sensitized Solar Cells by Hara, Kohjiro, Wang, Zhong-Sheng, Sato, Tadatake, Furube, Akihiro, Katoh, Ryuzi, Sugihara, Hideki, Dan-oh, Yasufumi, Kasada, Chiaki, Shinpo, Akira, Suga, Sadaharu

“…We have developed oligothiophene-containing coumarin dyes fully functionalized for dye-sensitized nanocrystalline TiO2 solar cells (DSSCs). DSSCs based on the…”
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Photophysical and (Photo)electrochemical Properties of a Coumarin Dye by Wang, Zhong-Sheng, Hara, Kohjiro, Dan-oh, Yasufumi, Kasada, Chiaki, Shinpo, Akira, Suga, Sadaharu, Arakawa, Hironori, Sugihara, Hideki

“…A new coumarin dye,…”
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Organic Sensitizers Based on Hexylthiophene-Functionalized Indolo[3,2-b]carbazole for Efficient Dye-Sensitized Solar Cells by Zhang, Xue-Hua, Wang, Zhong-Sheng, Cui, Yan, Koumura, Nagatoshi, Furube, Akihiro, Hara, Kohjiro

“…Two new organic sensitizers, MKZ-21 and MKZ-22, comprising 5,11-dioctylindolo[3,2-b]carbazole moiety as the electron donor, n-hexyl-substituted oligothiophene…”
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Enhancing the performance of quantum dots sensitized solar cell by SiO2 surface coating by Liu, Zhifu, Miyauchi, Masahiro, Uemura, Yu, Cui, Yan, Hara, Kohjiro, Zhao, Zhigang, Sunahara, Kenji, Furube, Akihiro

“…This letter reports enhanced performance of quantum dots sensitized solar cells by selectively deposition an insulating SiO2 layer over the quantum dots (QDs)…”
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Molecular Design of Coumarin Dyes for Efficient Dye-Sensitized Solar Cells by Hara, Kohjiro, Sato, Tadatake, Katoh, Ryuzi, Furube, Akihiro, Ohga, Yasuyo, Shinpo, Akira, Suga, Sadaharu, Sayama, Kazuhiro, Sugihara, Hideki, Arakawa, Hironori

“…We have developed novel coumarin dyes for use in dye-sensitized nanocrystalline TiO2 solar cells (DSSCs). The absorption spectra of these novel coumarin dyes…”
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Relationship between cross-linking conditions of ethylene vinyl acetate and potential induced degradation for crystalline silicon photovoltaic modules by Jonai, Sachiko, Hara, Kohjiro, Tsutsui, Yuji, Nakahama, Hidenari, Masuda, Atsushi

“…In this study, we investigated the relationship in crystalline silicon (c-Si) photovoltaic (PV) modules between the cross-linking level of copolymer of…”
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Microscopic aspects of potential-induced degradation phenomena and their recovery processes for p-type crystalline Si photovoltaic modules by Masuda, Atsushi, Akitomi, Minoru, Inoue, Masanao, Okuwaki, Keizo, Okugawa, Atsuo, Ueno, Kiyoshi, Yamazaki, Toshiharu, Hara, Kohjiro

“…Processes for potential-induced degradation (PID) and recovery phenomena were characterized using p-type multicrystalline Si photovoltaic modules and by PID…”
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Electron Transport in Coumarin-Dye-Sensitized Nanocrystalline TiO2 Electrodes by Hara, Kohjiro, Miyamoto, Koji, Abe, Yoshimoto, Yanagida, Masatoshi

“…We investigated electron transport kinetics in terms of electron diffusion coefficient (D) and electron lifetime (τ) in coumarin-dye-sensitized nanocrystalline…”
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