T. Umebayashi

5.8k total citations · 3 hit papers
14 papers, 5.1k citations indexed

About

T. Umebayashi is a scholar working on Materials Chemistry, Electrical and Electronic Engineering and Renewable Energy, Sustainability and the Environment. According to data from OpenAlex, T. Umebayashi has authored 14 papers receiving a total of 5.1k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Materials Chemistry, 9 papers in Electrical and Electronic Engineering and 5 papers in Renewable Energy, Sustainability and the Environment. Recurrent topics in T. Umebayashi's work include Perovskite Materials and Applications (5 papers), Luminescence Properties of Advanced Materials (5 papers) and Advanced Photocatalysis Techniques (5 papers). T. Umebayashi is often cited by papers focused on Perovskite Materials and Applications (5 papers), Luminescence Properties of Advanced Materials (5 papers) and Advanced Photocatalysis Techniques (5 papers). T. Umebayashi collaborates with scholars based in Japan and Belgium. T. Umebayashi's co-authors include Keisuke Asai, Tetsuya Yamaki, H. Itoh, Takahiro Mitsui, Michio Matsumura, Teruhisa Ohno, Miyako Akiyoshi, Takashi Kondo, Keisuke Asai and Hisayoshi Itoh and has published in prestigious journals such as Physical review. B, Condensed matter, Applied Physics Letters and Journal of Applied Physics.

In The Last Decade

T. Umebayashi

14 papers receiving 4.9k citations

Hit Papers

Band gap narrowing of titanium dioxide by sulfur doping 2002 2026 2010 2018 2002 2004 2002 400 800 1.2k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Band gap narrowing of titanium dioxide by sulfur doping
    2002 1.3k citations T. Umebayashi, Tetsuya Yamaki et al. Applied Physics Letters profile →
  2. Preparation of S-doped TiO2 photocatalysts and their photocatalytic activities under visible light
    2004 1.1k citations Teruhisa Ohno, Miyako Akiyoshi et al. Applied Catalysis A General profile →
  3. Analysis of electronic structures of 3d transition metal-doped TiO 2 based on band calculations
    2002 610 citations T. Umebayashi, Tetsuya Yamaki et al. Journal of Physics and Chemistry of Solids profile →

Peers

T. Umebayashi
Arnold J. Forman United States
Yaan Cao China
Hyun Gyu Kim South Korea
William B. Ingler United States
Mitsutake Oshikiri Japan
A. Chemseddine Germany
Maytal Caspary Toroker Israel
Jianjun Liu China
K. S. R. Koteswara Rao India
Burapat Inceesungvorn Thailand
Arnold J. Forman United States
T. Umebayashi
Citations per year, relative to T. Umebayashi T. Umebayashi (= 1×) peers Arnold J. Forman

Countries citing papers authored by T. Umebayashi

Since Specialization
Citations

This map shows the geographic impact of T. Umebayashi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by T. Umebayashi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Umebayashi more than expected).

Fields of papers citing papers by T. Umebayashi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by T. Umebayashi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by T. Umebayashi. The network helps show where T. Umebayashi may publish in the future.

Co-authorship network of co-authors of T. Umebayashi

This figure shows the co-authorship network connecting the top 25 collaborators of T. Umebayashi. A scholar is included among the top collaborators of T. Umebayashi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with T. Umebayashi. T. Umebayashi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

14 of 14 papers shown
1.
Kobayashi, Toru, N. Ronchi, Kaustuv Banerjee, et al.. (2021). Analog In-memory Computing in FeFET-based 1T1R Array for Edge AI Applications. 1–2. 30 indexed citations
2.
Tanaka, Ken’ichiro, Takayuki Takahashi, Takashi Kondo, et al.. (2005). Electronic and Excitonic Structures of Inorganic–Organic Perovskite-Type Quantum-Well Crystal (C4H9NH3)2PbBr4. Japanese Journal of Applied Physics. 44(8R). 5923–5923. 208 indexed citations
3.
Tanaka, Ken’ichiro, Takayuki Takahashi, Takashi Kondo, et al.. (2005). Image charge effect on two-dimensional excitons in an inorganic-organic quantum-well crystal. Physical Review B. 71(4). 190 indexed citations
4.
Choi, Yeongsoo, T. Umebayashi, & Mari Yoshikawa. (2004). Fabrication and characterization of C-doped anatase TiO2 photocatalysts. Journal of Materials Science. 39(5). 1837–1839. 224 indexed citations
5.
Tanaka, Kenichiro, et al.. (2004). One-dimensional excitons in inorganic–organic self-organized quantum-wire crystals [NH2C(I)=NH2]3PbI5 and [CH3SC(=NH2)NH2]3PbI5. Physica E Low-dimensional Systems and Nanostructures. 25(4). 378–383. 25 indexed citations
6.
Ohno, Teruhisa, Miyako Akiyoshi, T. Umebayashi, et al.. (2004). Preparation of S-doped TiO2 photocatalysts and their photocatalytic activities under visible light. Applied Catalysis A General. 265(1). 115–121. 1128 indexed citations breakdown →
7.
Umebayashi, T., Tetsuya Yamaki, Shunya Yamamoto, et al.. (2003). Sulfur-doping of rutile-titanium dioxide by ion implantation: Photocurrent spectroscopy and first-principles band calculation studies. Journal of Applied Physics. 93(9). 5156–5160. 277 indexed citations
8.
Umebayashi, T., Keisuke Asai, Takashi Kondo, & Aiko Nakao. (2003). Electronic structures of lead iodide based low-dimensional crystals. Physical review. B, Condensed matter. 67(15). 442 indexed citations
9.
Umebayashi, T., et al.. (2003). Visible Light-Induced Degradation of Methylene Blue on S-doped TiO2. Chemistry Letters. 32(4). 330–331. 475 indexed citations
10.
Umebayashi, T., Tetsuya Yamaki, T. Sumita, et al.. (2003). UV-ray photoelectron and ab initio band calculation studies on electronic structures of Cr- or Nb-ion implanted titanium dioxide. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 206. 264–267. 21 indexed citations
11.
Yamaki, Tetsuya, T. Umebayashi, T. Sumita, et al.. (2003). Fluorine-doping in titanium dioxide by ion implantation technique. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 206. 254–258. 116 indexed citations
12.
Choi, Young Woo, T. Umebayashi, Shunya Yamamoto, & Shojiro Tanaka. (2003). Fabrication of TiO2 photocatalysts by oxidative annealing of TiC. Journal of Materials Science Letters. 22(17). 1209–1211. 40 indexed citations
13.
Umebayashi, T., Tetsuya Yamaki, Hisayoshi Itoh, & Keisuke Asai. (2002). Analysis of electronic structures of 3d transition metal-doped TiO 2 based on band calculations. Journal of Physics and Chemistry of Solids. 63(10). 1909–1920. 610 indexed citations breakdown →
14.
Umebayashi, T., Tetsuya Yamaki, H. Itoh, & Keisuke Asai. (2002). Band gap narrowing of titanium dioxide by sulfur doping. Applied Physics Letters. 81(3). 454–456. 1282 indexed citations breakdown →

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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