World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
76
Citations
24899
World Ranking
4184
National Ranking
233

Kohjiro Hara publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Kohjiro Hara sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 150 publications — 14th percentile

14% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Kohjiro Hara D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Kohjiro Hara sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 76 D-Index — 77th percentile

77% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

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

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing an online degree can open doors to various career options related to Chemistry. While studying Chemistry specifically, students often consider interdisciplinary fields that complement their skills and interests. For example, exploring an online associate degree program in criminal justice can provide foundational knowledge applicable in research or regulatory roles.

Understanding the costs involved is crucial, so reviewing how much does a criminal justice degree cost can help prospective students budget their education effectively. Additionally, certifications like a paralegal certificate offer a specialized pathway that supports careers requiring legal and compliance expertise — highly relevant in chemical patent law or laboratory regulations.

Another career pathway worth exploring is pharmaceutical sales, where a solid grasp of Chemistry can give candidates an edge. Insights into the pharmaceutical rep salary help gauge the potential financial benefits and career growth in this field.

By strategically choosing relevant degrees and certifications, Chemistry students can expand their opportunities across industries, blending scientific knowledge with practical skills for diverse and rewarding careers.

Best Scientists Citing Kohjiro Hara

Trending Scientists

Recently Published Articles