Hitoshi Sai

4.9k total citations
134 papers, 4.0k citations indexed

About

Hitoshi Sai is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Hitoshi Sai has authored 134 papers receiving a total of 4.0k indexed citations (citations by other indexed papers that have themselves been cited), including 120 papers in Electrical and Electronic Engineering, 67 papers in Materials Chemistry and 19 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Hitoshi Sai's work include Thin-Film Transistor Technologies (99 papers), Silicon and Solar Cell Technologies (88 papers) and Silicon Nanostructures and Photoluminescence (54 papers). Hitoshi Sai is often cited by papers focused on Thin-Film Transistor Technologies (99 papers), Silicon and Solar Cell Technologies (88 papers) and Silicon Nanostructures and Photoluminescence (54 papers). Hitoshi Sai collaborates with scholars based in Japan, Germany and United States. Hitoshi Sai's co-authors include Michio Kondo, Yoshiaki Kanamori, Hiroo Yugami, Takuya Matsui, Koji Matsubara, Kimihiko Saito, Kazuhiro Hane, Takashi Koida, Masafumi Yamaguchi and Yoshio Ohshita and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and ACS Applied Materials & Interfaces.

In The Last Decade

Hitoshi Sai

129 papers receiving 3.9k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Hitoshi Sai Japan 38 3.1k 1.7k 1.0k 832 614 134 4.0k
Benedikt Bläsi Germany 27 1.8k 0.6× 521 0.3× 811 0.8× 632 0.8× 213 0.3× 135 2.5k
Hiroo Yugami Japan 23 1.0k 0.3× 663 0.4× 503 0.5× 716 0.9× 1.0k 1.7× 108 2.3k
Sang Eon Han United States 16 1.0k 0.3× 547 0.3× 941 0.9× 518 0.6× 581 0.9× 42 1.9k
N.H. Karam United States 28 4.0k 1.3× 951 0.6× 732 0.7× 1.8k 2.2× 227 0.4× 136 4.4k
Hailiang Li China 27 901 0.3× 636 0.4× 934 0.9× 384 0.5× 464 0.8× 103 2.8k
P. Campbell Australia 19 1.7k 0.6× 805 0.5× 674 0.7× 332 0.4× 58 0.1× 56 2.0k
Mohamed ElKabbash United States 23 597 0.2× 306 0.2× 994 1.0× 473 0.6× 328 0.5× 53 2.2k
U. Kroll Switzerland 34 4.2k 1.3× 3.2k 1.9× 552 0.6× 380 0.5× 35 0.1× 107 4.5k
Min Jin China 24 1.3k 0.4× 1.5k 0.9× 263 0.3× 152 0.2× 149 0.2× 105 2.2k
Yoshio Ohshita Japan 24 2.5k 0.8× 872 0.5× 558 0.6× 1.1k 1.3× 23 0.0× 323 3.0k

Countries citing papers authored by Hitoshi Sai

Since Specialization
Citations

This map shows the geographic impact of Hitoshi Sai'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 Hitoshi Sai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hitoshi Sai more than expected).

Fields of papers citing papers by Hitoshi Sai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hitoshi Sai. 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 Hitoshi Sai. The network helps show where Hitoshi Sai may publish in the future.

Co-authorship network of co-authors of Hitoshi Sai

This figure shows the co-authorship network connecting the top 25 collaborators of Hitoshi Sai. A scholar is included among the top collaborators of Hitoshi Sai 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 Hitoshi Sai. Hitoshi Sai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
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Gao, Peng, et al.. (2025). Color-control technique for building-integrated photovoltaics using red mica coating. Japanese Journal of Applied Physics. 64(4). 04SP59–04SP59.
3.
Sai, Hitoshi, Zhihao Xu, Andreas Lambertz, et al.. (2025). Light soaking of silicon heterojunction solar cells by applying high-intensity line-shaped laser scans. Cell Reports Physical Science. 6(5). 102558–102558.
4.
Xu, Zhihao, Takuya Matsui, Koji Matsubara, & Hitoshi Sai. (2024). Effect of multilayer structure and surface texturing on optical and electric properties of structural colored photovoltaic modules for BIPV applications. Applied Energy. 367. 123347–123347. 6 indexed citations
5.
Matsui, Takuya, et al.. (2024). Symmetric Dopant‐Free Si Solar Cells Enabled by TiOx Nanolayers: An In‐Depth Study on Bipolar Carrier Selectivity. Advanced Science. 12(3). e2410179–e2410179. 2 indexed citations
6.
Sai, Hitoshi, et al.. (2023). Highly efficient color-control technique for building-integrated photovoltaics using optical dielectric thin film. Japanese Journal of Applied Physics. 62(SK). SK1010–SK1010. 8 indexed citations
7.
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Sai, Hitoshi & Takuya Matsui. (2023). Toward TCO‐Free Silicon Heterojunction Solar Cells: Effect of TCO Layers in Electrical Transport and Stability. Solar RRL. 7(18). 10 indexed citations
9.
Makita, Kikuo, Hidenori Mizuno, Hitoshi Sai, et al.. (2022). GaAs//Si Multijunction Solar Cells Fabricated via Mechanical Stack Technology Using Pd Nanoparticles and Metal-Assisted Chemical Etching. IEEE Journal of Photovoltaics. 13(1). 105–112. 1 indexed citations
10.
Li, Yuqing, Hitoshi Sai, Takuya Matsui, et al.. (2022). Nanopyramid Texture Formation by One‐Step Ag‐Assisted Solution Process for High‐Efficiency Monocrystalline Si Solar Cells. Solar RRL. 6(11). 4 indexed citations
11.
Sai, Hitoshi, Vladimír Švrček, Atsushi Kogo, et al.. (2022). In Situ Grown Nanocrystalline Si Recombination Junction Layers for Efficient Perovskite–Si Monolithic Tandem Solar Cells: Toward a Simpler Multijunction Architecture. ACS Applied Materials & Interfaces. 14(29). 33505–33514. 12 indexed citations
12.
Tutsch, Leonard, Hitoshi Sai, Takuya Matsui, et al.. (2021). The sputter deposition of broadband transparent and highly conductive cerium and hydrogen co‐doped indium oxide and its transfer to silicon heterojunction solar cells. Progress in Photovoltaics Research and Applications. 29(7). 835–845. 31 indexed citations
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Matsui, Takuya, Martin Bivour, Martin Hermle, & Hitoshi Sai. (2020). Atomic-Layer-Deposited TiOx Nanolayers Function as Efficient Hole-Selective Passivating Contacts in Silicon Solar Cells. ACS Applied Materials & Interfaces. 12(44). 49777–49785. 37 indexed citations
16.
Matsui, Takuya, et al.. (2018). Progress and limitations of thin-film silicon solar cells. Solar Energy. 170. 486–498. 50 indexed citations
17.
Bidiville, Adrien, Takuya Matsui, Hitoshi Sai, & Koji Matsubara. (2017). Role of the Fermi level in the formation of electronic band-tails and mid-gap states of hydrogenated amorphous silicon in thin-film solar cells. Journal of Applied Physics. 122(9). 3 indexed citations
18.
Sai, Hitoshi, Hidenori Mizuno, Kikuo Makita, & Koji Matsubara. (2017). Light absorption enhancement in thin-film GaAs solar cells with flattened light scattering substrates. Journal of Applied Physics. 122(12). 9 indexed citations
19.
Sai, Hitoshi, Takuya Matsui, & Koji Matsubara. (2017). Key Points in the Latest Developments of High‐Efficiency Thin‐Film Silicon Solar Cells. physica status solidi (a). 214(12). 11 indexed citations
20.
Koida, Takashi, Hitoshi Sai, Hajime Shibata, & Michio Kondo. (2012). Trend of transparent conductive oxides for solar cells. 45–48. 2 indexed citations

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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