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Tomokazu Umeyama

Tomokazu Umeyama

D-Index & Metrics

Chemistry

D-Index
54
Citations
9533
World Ranking
12695
National Ranking
957

Overview

Tomokazu Umeyama is affiliated with Kyoto University in Japan and has contributed to research primarily in the fields of Engineering and Materials Science. Their work is focused on several specialized subfields including Electrical and Electronic Engineering, Materials Chemistry, Polymers and Plastics, Organic Chemistry, and Biomedical Engineering.

The research topics covered by Tomokazu Umeyama encompass Organic Electronics and Photovoltaics, Conducting Polymers and Applications, Perovskite Materials and Applications, Molecular Junctions and Nanostructures, 2D Materials and Applications, Quantum Dots Synthesis and Properties, as well as Fullerene Chemistry and Applications.

Frequent co-authors collaborating with Umeyama include Hiroshi Imahori, Wataru Suzuki, Tomoyuki Koganezawa, Akira Yamakata, and Daiki Sasada.

Key recent papers authored or co-authored by Tomokazu Umeyama include:

  • Efficient light-harvesting, energy migration, and charge transfer by nanographene-based nonfullerene small-molecule acceptors exhibiting unusually long excited-state lifetime in the film state (2020, Chemical Science)
  • Efficient Exciton Diffusion in Micrometer-Sized Domains of Nanographene-Based Nonfullerene Acceptors with Long Exciton Lifetimes in Blend Films with Conjugated Polymer (2020, ACS Applied Materials & Interfaces)

Other related publications in the broader research environment include works in the Journal of Cleaner Production, The Journal of Physical Chemistry Letters, and Carbon, although those feature other leading authors in the field.

Tomokazu Umeyama frequently publishes in venues such as ECS Meeting Abstracts, Chemical Science, and the Journal of Photopolymer Science and Technology. The volume of publications in these venues highlights a consistent engagement with topics spanning photopolymer science and advanced materials chemistry.

Best Publications

  • Large pi-aromatic molecules as potential sensitizers for highly efficient dye-sensitized solar cells.

    Hiroshi Imahori;Tomokazu Umeyama;Seigo Ito

  • Electron-donating perylene tetracarboxylic acids for dye-sensitized solar cells.

    Yuki Shibano;Tomokazu Umeyama;Yoshihiro Matano;Hiroshi Imahori

  • Novel unsymmetrically π-elongated porphyrin for dye-sensitized TiO2 cells

    Masanobu Tanaka;Shinya Hayashi;Seunghun Eu;Tomokazu Umeyama

  • Carbon nanotube-modified electrodes for solar energy conversion

    Tomokazu Umeyama;Hiroshi Imahori

  • Quinoxaline-fused porphyrins for dye-sensitized solar cells

    Seunghun Eu;Shinya Hayashi;Tornokazu Umeyama;Yoshihiro Matano

  • Self-assembling porphyrins and phthalocyanines for photoinduced charge separation and charge transport

    Hiroshi Imahori;Tomokazu Umeyama;Tomokazu Umeyama;Kei Kurotobi;Yuta Takano

  • Supramolecular Donor-Acceptor Heterojunctions by Vectorial Stepwise Assembly of Porphyrins and Coordination-Bonded Fullerene Arrays for Photocurrent Generation

    Aiko Kira;Tomokazu Umeyama;Yoshihiro Matano;Kaname Yoshida

  • Photodynamic and photothermal effects of semiconducting and metallic-enriched single-walled carbon nanotubes.

    Tatsuya Murakami;Hirotaka Nakatsuji;Mami Inada;Yoshinori Matoba

  • Electron Transfer Cascade by Organic/Inorganic Ternary Composites of Porphyrin, Zinc Oxide Nanoparticles, and Reduced Graphene Oxide on a Tin Oxide Electrode that Exhibits Efficient Photocurrent Generation

    Hironobu Hayashi;Ian V. Lightcap;Masahiko Tsujimoto;Mikio Takano

  • Naphthyl-Fused π-Elongated Porphyrins for Dye-Sensitized TiO2 Cells

    Shinya Hayashi;Masanobu Tanaka;Hironobu Hayashi;Seunghun Eu

  • Effects of meso-Diarylamino Group of Porphyrins as Sensitizers in Dye-Sensitized Solar Cells on Optical, Electrochemical, and Photovoltaic Properties

    Hiroshi Imahori;Yusuke Matsubara;Hiroaki Iijima;Tomokazu Umeyama

  • Effects of Porphyrin Substituents and Adsorption Conditions on Photovoltaic Properties of Porphyrin-Sensitized TiO2 Cells

    Hiroshi Imahori;Shinya Hayashi;Hironobu Hayashi;Akane Oguro

  • Synthesis of sterically hindered phthalocyanines and their applications to dye-sensitized solar cells.

    Seunghun Eu;Takashi Katoh;Tomokazu Umeyama;Yoshihiro Matano

  • Isomer Effects of Fullerene Derivatives on Organic Photovoltaics and Perovskite Solar Cells.

    Tomokazu Umeyama;Hiroshi Imahori

  • Effects of 5-Membered Heteroaromatic Spacers on Structures of Porphyrin Films and Photovoltaic Properties of Porphyrin-Sensitized TiO2 Cells

    Seunghun Eu;Shinya Hayashi;Tomokazu Umeyama;Akane Oguro

  • Segregated Donor–Acceptor Columns in Liquid Crystals That Exhibit Highly Efficient Ambipolar Charge Transport

    Hironobu Hayashi;Wataru Nihashi;Tomokazu Umeyama;Yoshihiro Matano

  • Comparison of electrode structures and photovoltaic properties of porphyrin-sensitized solar cells with TiO2 and Nb, Ge, Zr-added TiO2 composite electrodes.

    Hiroshi Imahori;Shinya Hayashi;Tomokazu Umeyama;Seunghun Eu

  • Synthesis and Photophysical and Photovoltaic Properties of Porphyrin−Furan and −Thiophene Alternating Copolymers

    Tomokazu Umeyama;Takeshi Takamatsu;Noriyasu Tezuka;Yoshihiro Matano

  • Photothermal ablation of tumor cells using a single-walled carbon nanotube-peptide composite.

    Yasuhiko Hashida;Hironori Tanaka;Shuwen Zhou;Shigeru Kawakami

  • Donor−Acceptor Nanoarchitecture on Semiconducting Electrodes for Solar Energy Conversion

    Hiroshi Imahori;Tomokazu Umeyama

Frequent Co-Authors

Hiroshi Imahori
Hiroshi Imahori Kyoto University
Yoshihiro Matano
Yoshihiro Matano Niigata University
Nikolai V. Tkachenko
Nikolai V. Tkachenko Tampere University
Helge Lemmetyinen
Helge Lemmetyinen Tampere University
Seiji Isoda
Seiji Isoda Kyoto University
Seigo Ito
Seigo Ito University of Hyogo
Yoshiki Chujo
Yoshiki Chujo Kyoto University
Shu Seki
Shu Seki Kyoto University
Kensuke Naka
Kensuke Naka Kyoto Institute of Technology
Tetsuya Shishido
Tetsuya Shishido Tokyo Metropolitan University

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