T. Hirai

498 total citations
28 papers, 331 citations indexed

About

T. Hirai is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, T. Hirai has authored 28 papers receiving a total of 331 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Electrical and Electronic Engineering, 16 papers in Materials Chemistry and 4 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in T. Hirai's work include Phase-change materials and chalcogenides (8 papers), Advanced Thermoelectric Materials and Devices (8 papers) and Chalcogenide Semiconductor Thin Films (7 papers). T. Hirai is often cited by papers focused on Phase-change materials and chalcogenides (8 papers), Advanced Thermoelectric Materials and Devices (8 papers) and Chalcogenide Semiconductor Thin Films (7 papers). T. Hirai collaborates with scholars based in Japan, United States and China. T. Hirai's co-authors include Kazuhiro Kurata, K. Tsuji, Y. Takasaki, Keiichi Shidara, Kenkichi Tanioka, Kazuhisa Taketoshi, Ryukiti R. Hasiguti, Hirotaka Maruyama, Soushi Suzuki and Takeshi Fujita and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Journal of The Electrochemical Society.

In The Last Decade

T. Hirai

27 papers receiving 303 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
T. Hirai Japan	12	222	200	64	34	29	28	331
Kazuhisa Taketoshi Japan	8	193 0.9×	113 0.6×	46 0.7×	30 0.9×	23 0.8×	20	261
Keiichi Shidara Japan	7	217 1.0×	122 0.6×	44 0.7×	49 1.4×	19 0.7×	15	284
P. Paillet France	19	699 3.1×	160 0.8×	110 1.7×	51 1.5×	43 1.5×	41	784
Yuji Ohkawa Japan	10	225 1.0×	151 0.8×	30 0.5×	79 2.3×	21 0.7×	27	346
H. Ooms Belgium	11	175 0.8×	104 0.5×	86 1.3×	52 1.5×	4 0.1×	29	345
F. Lemmi United States	13	476 2.1×	198 1.0×	72 1.1×	63 1.9×	16 0.6×	51	535
P. Nylén Sweden	12	359 1.6×	174 0.9×	39 0.6×	138 4.1×	15 0.5×	29	471
W.S. Khokle India	10	268 1.2×	98 0.5×	128 2.0×	18 0.5×	36 1.2×	75	391
B. Taylor United States	12	391 1.8×	98 0.5×	92 1.4×	16 0.5×	40 1.4×	25	486
J. Drewery United States	11	265 1.2×	121 0.6×	61 1.0×	182 5.4×	92 3.2×	30	404

Countries citing papers authored by T. Hirai

Since Specialization

Citations

This map shows the geographic impact of T. Hirai'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. Hirai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Hirai more than expected).

Fields of papers citing papers by T. Hirai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

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

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

All Works

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20 of 20 papers shown

Gotoh, Tamihiro & T. Hirai. (2025). Effect of heat treatment on the electronic properties of vacuum-deposited In–Se films. Journal of Materials Science Materials in Electronics. 36(8).

Ohkawa, Yuji, Toshio Matsubara, Kazunori Miyakawa, et al.. (2002). Improvement of quantum efficiency of HARP photoconductive film by using CdSe layer. 103–103. 1 indexed citations

Nishida, Isao, et al.. (2002). Effect of microstructure and composition on thermoelectric properties of Te-rich Sb/sub 2/Te/sub 3/. 3. 178–181. 1 indexed citations

Chen, W., et al.. (2001). Low temperature thermoelectric properties of Ni doped n-type filled skutterudites Ba0.3Co4Sb12 .. 69–72. 1 indexed citations

Chen, Lidong, Takashi Goto, Jeffrey S. Dyck, et al.. (2001). Synthesis and high temperature thermoelectric properties of n-type BayNixCo4-xSb12.. 97–100. 1 indexed citations

Umetani, Keiji, K. Uéda, T. Hirai, et al.. (1996). High-Spatial-Resolution Medical-Imaging System Using a HARPICON Camera Coupled with a Fluorescent Screen. Journal of Synchrotron Radiation. 3(3). 136–144. 11 indexed citations

Kubota, Mitsuru, Takaaki Kato, Soushi Suzuki, et al.. (1996). Ultrahigh-sensitivity New Super-HARP camera. IEEE Transactions on Broadcasting. 42(3). 251–258. 60 indexed citations

Tsuji, Keita, et al.. (1993). Avalanche-type X-ray Image Pickup Tube. 17(80). 1–6. 1 indexed citations

Tsuji, K., Y. Takasaki, T. Hirai, & Kazuhisa Taketoshi. (1989). Impact ionization process in amorphous selenium. Journal of Non-Crystalline Solids. 114. 94–96. 26 indexed citations

10.

Takasaki, Y., K. Tsuji, T. Hirai, et al.. (1988). Avalanche Multiplication of Photo-Generated Carriers in Amorphous Semiconductor, and its Application to Imaging Device. MRS Proceedings. 118. 11 indexed citations

11.

Takasaki, Y., et al.. (1987). Avalanche Multiplication in Amorphous Selenium. 3 indexed citations

12.

Sawanishi, Hiroyuki, T. Hirai, & Takashi Tsuchiya. (1984). ChemInform Abstract: PHOTOLYSIS AND THERMOLYSIS OF QUINOLYL AND ISOQUINOLYL AZIDES IN ETHANETHIOL. Chemischer Informationsdienst. 15(48). 2 indexed citations

13.

Takasaki, Y., et al.. (1983). A new imaging device using amorphous silicon. 509–512. 1 indexed citations

14.

Takasaki, Y., et al.. (1982). Single-tube Color Imager using Hydrogenated Amorphous Silicon. 1 indexed citations

15.

Hirai, T. & Kazuhiro Kurata. (1968). The Phase Diagram of Pseudo-Binary System PbTe–CdTe and its Thermoelectric Properties. Transactions of the Japan Institute of Metals. 9(4). 301–303. 5 indexed citations

16.

Hirai, T., et al.. (1967). The pseudo-binary V2VI3-IV·VI compounds systems, Bi2Te3-PbTe, Bi2Te3-SnTe, Sb2Te3-PbTe, Sb2Te3-SnTe and Bi2Se3-SnSe. Journal of the Less Common Metals. 13(3). 352–356. 35 indexed citations

17.

Hirai, T., et al.. (1967). Derivation of new semiconducting compounds by cross substitution for group IV semiconductors, and their semiconducting and thermal properties. Solid-State Electronics. 10(10). 975–981. 26 indexed citations

18.

Hirai, T., et al.. (1966). Phase diagrams of the pseudo-binary Cu2SeBi2Se3 and Ag2SeBi2Se3 systems and thermoelectric properties of Cu2SeBi2Se3 solid solution. 6(4). 195–200. 1 indexed citations

19.

Kurata, Kazuhiro & T. Hirai. (1966). Semiconducting properties of several IIIB-VB-VIB ternary materials and their metallurgical aspects. Solid-State Electronics. 9(6). 633–640. 16 indexed citations

20.

Hasiguti, Ryukiti R. & T. Hirai. (1951). Internal Friction of Cold-Worked Single Crystals of Copper. Journal of Applied Physics. 22(8). 1084–1085. 13 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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