Found 39 results

Filters: author is Hara
2008
Hexylthiophene-Functionalized Carbazole Dyes for Efficient Molecular Photovoltaics: Tuning of Solar-Cell Performance by Structural Modification, Wang, Zhong-Sheng; Koumura, Nagatoshi; Cui, Yan; Takahashi, Masabumi; Sekiguchi, Hiroki; Mori, Atsunori; Kubo, Toshitaka; Furube, Akihiro; Hara, Kohjiro , Chem. Mater., Volume 20, Issue 12, p.3993-4003, (2008)
Hexylthiophene-Functionalized Carbazole Dyes for Efficient Molecular Photovoltaics: Tuning of Solar-Cell Performance by Structural Modification, Wang, Zhong-Sheng; Koumura, Nagatoshi; Cui, Yan; Takahashi, Masabumi; Sekiguchi, Hiroki; Mori, Atsunori; Kubo, Toshitaka; Furube, Akihiro; Hara, Kohjiro , Chem. Mater., Volume 20, Issue 12, p.3993-4003, (2008)
Attachment of disilanylene-oligothienylene polymers on TiO2 surface by photochemical cleavage of the Si-Si bonds, Ohshita J; Matsukawa J; Hara M; Kunai A; Kajiwara S; Ooyama Y; Harima Y; Kakimoto M , CHEMISTRY LETTERS, Volume 37, Issue 3, p.316-317, (2008)
Surface state passivation effect for nanoporous TiO2 electrode evaluated by thermally stimulated current and application to all-solid state dye-sensitized solar cells, Noma Y; Kado T; Ogata D; Hara Y; Hayase S , JAPANESE JOURNAL OF APPLIED PHYSICS, Volume 47, Issue 1, p.505-508 Part: Part 2, (2008)
2007
Effect of the Particle Size on the Electron Injection Efficiency in Dye-Sensitized Nanocrystalline TiO2 Films Studied by Time-Resolved Microwave Conductivity (TRMC) Measurements, Katoh, R.; Huijser, A.; Hara, K.; Savenije, T.J.; Siebbeles, L.D.A. , J. Phys. Chem. C, Volume 111, Issue 28, p.10741-10746, (2007)
Thiophene-Functionalized Coumarin Dye for Efficient Dye-Sensitized Solar Cells: Electron Lifetime Improved by Coadsorption of Deoxycholic Acid, Wang, Z.-S.; Cui, Y.; Dan-oh, Y.; Kasada, C.; Shinpo, A.; Hara, K. , J. Phys. Chem. C, Volume 111, Issue 19, p.7224-7230, (2007)
2006
Near-IR transient absorption study on ultrafast electron-injection dynamics from a Ru-complex dye into nanocrystalline In2O3 th, Furube A,; Murai M,; Watanabe S,; Hara K,; Katoh R,; Tachiya M , J. Photochem. Photobiol., A Chemistry,, Volume 182 (3):, p.273-279 Sp. Iss. SI,, (2006)
2005
Lithium Ion Effect on Electron Injection from a Photoexcited Coumarin Derivative into a TiO2 Nanocrystalline Film Inv, Furube, A.; Katoh, R.; Hara, K.; Sato, T.; Murata, S.; Arakawa, H.; Tachiya, M. , J. Phys. Chem. B., September 1, 200, Volume 109, Issue 34, p.16406-16414, (2005)
Photophysical and (Photo)electrochemical Properties of a Coumarin Dye, Wang, Z.-S.; Hara, K.; Dan-oh, Y.; Kasada, C.; Shinpo, A.; Suga, S.; Arakawa, H.; Sugihara, H. , J. Phys. Chem. B., March 10, 2005, Volume 109, Issue 9, p.3907-3914, (2005)
Electron Transport in Coumarin-Dye-Sensitized Nanocrystalline TiO2 Electrodes, Hara, K.; Miyamoto, K.; Abe, Y.; Yanagida, M. , J. Phys. Chem.B., December 22, 200, Volume 109, Issue 50, p.23776-23778, (2005)
Oligothiophene-Containing Coumarin Dyes for Efficient Dye-Sensitized Solar Cells, Hara, K.; Wang, Z.-S.; Sato, T.; Furube, A.; Katoh, R.; Sugihara, H.; Dan-oh, Y.; Kasada, C.; Shinpo, A.; Suga, S. , J. Phys. Chem. B., August 18, 2005, Volume 109, Issue 32, p.15476-15482, (2005)
Influence of electrolyte on the photovoltaic performance of a dye-sensitized TiO2 solar cell based on a Ru(II) terpyridyl comple, Hara, K.,; Nishikawa, T.,; Kurashige, M.,; Kawauchi, H.,; Kashima, T.,; Sayama, K.,; Alka, K.,; Arakawa, H. , Solar Energy Mater. Solar Cells, Volume 85 (1):, p.21-30, (2005)
2004
Effect of Additives on the Photovoltaic Performance of Coumarin-Dye-Sensitized Nanocrystalline TiO2 Solar Cells, Hara, K.; Dan-oh, Y.; Kasada, C.; Ohga, Y.; Shinpo, A.; Suga, S.; Sayama, K.; Arakawa, H. , Langmuir, May 11, 2004, Volume 20, Issue 10, p.4205-4210, (2004)
Identification of Reactive Species in Photoexcited Nanocrystalline TiO2 Films by Wide-Wavelength-Range (400-2500 nm), Yoshihara, T.; Katoh, R.; Furube, A.; Tamaki, Y.; Murai, M.; Hara, K.; Murata, S.; Arakawa, H.; Tachiya, M. , J. Phys.Chem. B.,, March 25, 2004, Volume 108, Issue 12, p.3817-3823, (2004)
Quantitative Estimation of the Efficiency of Electron Injection from Excited Sensitizer Dye into Nanocrystalline ZnO Film, Yoshihara, T.; Katoh, R.; Furube, A.; Murai, M.; Tamaki, Y.; Hara, K.; Murata, S.; Arakawa, H.; Tachiya, M. , J. Phys. Chem. B., February 26, 200, Volume 108, Issue 8, p.2643-2647, (2004)
Efficiencies of Electron Injection from Excited N3 Dye into Nanocrystalline Semiconductor (ZrO2, TiO2, ZnO, Katoh, R.; Furube, A.; Yoshihara, T.; Hara, K.; Fujihashi, G.; Takano, S.; Murata, S.; Arakawa, H.; Tachiya, M. , J. Phys. Chem. B., April 15, 2004, Volume 108, Issue 15, p.4818-4822, (2004)
Microscopic imaging of the efficiency of electron injection from excited sensitizer dye into nanocrystalline ZnO film, Katoh R,; Furube A,; Tamaki Y,; Yoshihara T,; Murai M,; Hara K,; Murata S,; Arakawa H,; Tachiya M , J. Photochem. Photobiol. A (Chem.), Volume 166 (1-3):, p.69-74 Sp. Iss. SI,, (2004)
2003
Molecular Design of Coumarin Dyes for Efficient Dye-Sensitized Solar Cells, Hara, K.; Sato, T.; Katoh, R.; Furube, A.; Ohga, Y.; Shinpo, A.; Suga, S.; Sayama, K.; Sugihara, H.; Arakawa, H. , J. Phys. Chem. B., January 16, 2003, Volume 107, Issue 2, p.597-606, (2003)
Design of new coumarin dyes having thiophene moieties for highly efficient organic-dye-sensitized solar cells, Kohjiro Hara; Mitsuhiko Kurashige; Yasufumi Dan-oh; Chiaki Kasada; Akira Shinpo; Sadaharu Suga; Kazuhiro Sayama; Hironori Arakawa , New J. Chem., Volume 27, p.783 - 785,, (2003)
Dye-sensitized nanocrystalline TiO2 solar cells based on novel coumarin dyes, Hara, K.,; Tachibana, Y.,; Ohga, Y.,; Shinpo, A.,; Suga , S.,; Sayama, K.,; Sugihara, H.,; Arakawa, H. , Solar Energy Mater. Solar Cells,, Volume 77 (1), p.89-103, (2003)
Efficient sensitization of nanocrystalline TiO2 films with cyanine and merocyanine organic dyes, Sayam,a K.,; Tsukagoshi, S.,; Mori ,T.,; Hara, K.,; Ohga, Y.,; Shinpou, A.,; Abe, Y.,; Suga, S.,; Arakawa, H. , Solar Energy Mater. Solar Cells,, Volume 80 (1), p.47-71, (2003)
Novel and efficient organic liquid electrolytes for dye-sensitized solar cells based on a Ru(II) terpyridyl complex photosensiti, Hara, K.,; Nishikawa, T.,; Sayama, K.,; Aika, K.,; Arakawa, H. , Chemistry Letters,, Volume 32 (11), p.1014-1015, (2003)
Novel polyene dyes for highly efficient dye-sensitized solar cells, Kohjiro Hara; Mitsuhiko Kurashige; Shunichiro Ito; Akira Shinpo; Sadaharu Suga, Kazuhiro Sayama and Hironori Arakawa , Chem. Commun., p.252 - 253,, (2003)
2002
Quantitative Analysis of Light-Harvesting Efficiency and Electron-Transfer Yield in Ruthenium-Dye-Sensitized Nanocrystalline TiO, Tachibana, Y.; Hara, K.; Sayama, K.; Arakawa, H. , Chem. Mater., June 17, 2002, Volume 14, Issue 6, p.2527-2535, (2002)
Effect of the Ligand Structure on the Efficiency of Electron Injection from Excited Ru-Phenanthroline Complexes to Nanocrystalli, Hara, K.; Horiuchi, H.; Katoh, R.; Singh, L.P.; Sugihara, H.; Sayama, K.; Murata, S.; Tachiya, M.; Arakawa, H. , J. Phys. Chem. B., January 17, 2002, Volume 106, Issue 2, p.374-379, (2002)
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