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D-Index
76
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24899
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4184
National Ranking
232

Overview

Kohjiro Hara is affiliated with the National Institute of Advanced Industrial Science and Technology in Japan. Their research primarily focuses on engineering and energy, with substantial contributions to electrical and electronic engineering as well as renewable energy, sustainability, and environmental engineering.

The research topics covered by Hara include:

  • Photovoltaic System Optimization Techniques
  • Silicon and Solar Cell Technologies
  • Thin-Film Transistor Technologies
  • Photovoltaic Systems and Sustainability
  • Solar cell performance optimization
  • TiO2 Photocatalysis and Solar Cells
  • Transition Metal Oxide Nanomaterials

Hara has published extensively in the following venues:

  • Journal of Photochemistry and Photobiology A Chemistry
  • Japanese Journal of Applied Physics
  • Journal of the Ceramic Society of Japan

Recent publications include:

  • "Spectroscopic investigation of long-term outdoor-exposed crystalline silicon photovoltaic modules" (2020), Journal of Photochemistry and Photobiology A Chemistry
  • "Raman spectroscopic analysis of encapsulants in aged photovoltaic modules" (2021), Journal of Photochemistry and Photobiology A Chemistry
  • "Durable polyolefin encapsulants in aged photovoltaic modules" (2022), Journal of Photochemistry and Photobiology A Chemistry
  • "Durable crystalline silicon photovoltaic modules based on breathable structure" (2020), Japanese Journal of Applied Physics

Hara has collaborated frequently with several researchers, including:

  • Yasuo Chiba
  • Yasushi Shirahige
  • Hiromichi Ichinose
  • Mitsunori Yada

Best Publications

  • Molecular Design of Coumarin Dyes for Efficient Dye-Sensitized Solar Cells

    Kohjiro Hara;Tadatake Sato;Ryuzi Katoh;Akihiro Furube

  • Ultrafast plasmon-induced electron transfer from gold nanodots into TiO2 nanoparticles.

    Akihiro Furube;Luchao Du;Kohjiro Hara;Ryuzi Katoh

  • Alkyl-functionalized organic dyes for efficient molecular photovoltaics.

    Nagatoshi Koumura;Zhong-Sheng Wang;Shogo Mori;Masanori Miyashita

  • 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

  • A High‐Light‐Harvesting‐Efficiency Coumarin Dye for Stable Dye‐Sensitized Solar Cells

    Zhong-Sheng Wang;Yan Cui;Kohjiro Hara;Yasufumi Dan-Oh

  • Highly efficient photon-to-electron conversion with mercurochrome-sensitized nanoporous oxide semiconductor solar cells

    Kohjiro Hara;Takaro Horiguchi;Tohru Kinoshita;Kazuhiro Sayama

  • A coumarin-derivative dye sensitized nanocrystalline TiO2 solar cell having a high solar-energy conversion efficiency up to 5.6%

    Kohjiro Hara;Kazuhiro Sayama;Yasuyo Ohga;Akira Shinpo

  • Hexylthiophene-Functionalized Carbazole Dyes for Efficient Molecular Photovoltaics: Tuning of Solar-Cell Performance by Structural Modification

    Zhong-Sheng Wang;Nagatoshi Koumura;Yan Cui;Masabumi Takahashi

  • Thiophene-Functionalized Coumarin Dye for Efficient Dye-Sensitized Solar Cells: Electron Lifetime Improved by Coadsorption of Deoxycholic Acid

    Zhong-Sheng Wang, ,†;Yan Cui;‡ Yasufumi Dan-oh;Chiaki Kasada

  • Efficiencies of Electron Injection from Excited N3 Dye into Nanocrystalline Semiconductor (ZrO2, TiO2, ZnO, Nb2O5, SnO2, In2O3) Films

    Ryuzi Katoh;Akihiro Furube;Toshitada Yoshihara;Kohjiro Hara

  • Oligothiophene-containing coumarin dyes for efficient dye-sensitized solar cells.

    Kohjiro Hara;† Zhong-Sheng Wang;Tadatake Sato;Akihiro Furube

  • Effect of additives on the photovoltaic performance of coumarin-dye-sensitized nanocrystalline TiO2 solar cells.

    Kohjiro Hara;Yasufumi Dan-oh;Chiaki Kasada;Yasuyo Ohga

  • Identification of Reactive Species in Photoexcited Nanocrystalline TiO2 Films by Wide-Wavelength-Range (400−2500 nm) Transient Absorption Spectroscopy

    Toshitada Yoshihara;Ryuzi Katoh;Akihiro Furube;Yoshiaki Tamaki

  • Photoelectrochemical Properties of J Aggregates of Benzothiazole Merocyanine Dyes on a Nanostructured TiO2 Film

    Kazuhiro Sayama;Shingo Tsukagoshi;Kohjiro Hara;Yasuyo Ohga

  • Novel conjugated organic dyes for efficient dye-sensitized solar cells

    K. Hara;T. Sato;R. Katoh;A. Furube

  • Photosensitization of a porous TiO2 electrode with merocyanine dyes containing a carboxyl group and a long alkyl chain

    Kazuhiro Sayama;Kohjiro Hara;Nahoko Mori;Makoto Satsuki

  • Efficient sensitization of nanocrystalline TiO2 films with cyanine and merocyanine organic dyes

    Kazuhiro Sayama;Shingo Tsukagoshi;Tohru Mori;Kohjiro Hara

  • Photophysical and (photo)electrochemical properties of a coumarin dye.

    Zhong-Sheng Wang;Kohjiro Hara;Yasufumi Dan-oh;Chiaki Kasada

  • Electrochemical reduction of carbon dioxide under high pressure on various electrodes in an aqueous electrolyte

    Kohjiro Hara;Akihiko Kudo;Tadayoshi Sakata

  • Novel polyene dyes for highly efficient dye-sensitized solar cells.

    Kohjiro Hara;Mitsuhiko Kurashige;Shunichiro Ito;Akira Shinpo

Frequent Co-Authors

Ryuzi Katoh
Ryuzi Katoh Nihon University
Akihiro Furube
Akihiro Furube University of Tokushima
Kazuhiro Sayama
Kazuhiro Sayama National Institute of Advanced Industrial Science and Technology
Hideki Sugihara
Hideki Sugihara National Institute of Advanced Industrial Science and Technology
Masatoshi Yanagida
Masatoshi Yanagida National Institute for Materials Science
Ashraful Islam
Ashraful Islam National Institute for Materials Science
Hironori Arakawa
Hironori Arakawa Tokyo University of Science
Zhigang Zhao
Zhigang Zhao Chinese Academy of Sciences
Masahiro Miyauchi
Masahiro Miyauchi Tokyo Institute of Technology
Atsunori Mori
Atsunori Mori Kobe University

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