Takayuki Negami

4.5k total citations · 1 hit paper
95 papers, 3.9k citations indexed

About

Takayuki Negami is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Takayuki Negami has authored 95 papers receiving a total of 3.9k indexed citations (citations by other indexed papers that have themselves been cited), including 94 papers in Electrical and Electronic Engineering, 70 papers in Materials Chemistry and 16 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Takayuki Negami's work include Chalcogenide Semiconductor Thin Films (84 papers), Quantum Dots Synthesis And Properties (56 papers) and Copper-based nanomaterials and applications (28 papers). Takayuki Negami is often cited by papers focused on Chalcogenide Semiconductor Thin Films (84 papers), Quantum Dots Synthesis And Properties (56 papers) and Copper-based nanomaterials and applications (28 papers). Takayuki Negami collaborates with scholars based in Japan, United Kingdom and Switzerland. Takayuki Negami's co-authors include Takahiro Wada, Naoki Kohara, Yasuhiro Hashimoto, Shiro Nishiwaki, Mikihiko Nishitani, Yoshihiro Hamakawa, Takashi Minemoto, Hideyuki Takakura, Takuya Satoh and Takeshi Uenoyama and has published in prestigious journals such as Advanced Materials, Physical review. B, Condensed matter and Applied Physics Letters.

In The Last Decade

Takayuki Negami

90 papers receiving 3.8k citations

Hit Papers

align trajectories

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.

Theoretical analysis of the effect of conduction band offset of window/CIS layers on performance of CIS solar cells using device simulation

2001 570 citations Takashi Minemoto, Takayuki Negami et al. Solar Energy Materials and Solar Cells profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Takayuki Negami Japan	32	3.7k	3.4k	713	221	197	95	3.9k
Bülent M. Başol United States	28	2.0k 0.5×	1.8k 0.5×	453 0.6×	74 0.3×	87 0.4×	113	2.2k
Pablo Palacios Spain	25	1.7k 0.4×	1.6k 0.5×	504 0.7×	89 0.4×	174 0.9×	75	2.0k
M. Ruckh Germany	14	1.8k 0.5×	1.7k 0.5×	464 0.7×	20 0.1×	63 0.3×	25	1.9k
Swati Ray India	21	1.6k 0.4×	1.5k 0.4×	142 0.2×	168 0.8×	137 0.7×	109	1.8k
D. Nesheva Bulgaria	18	955 0.3×	1.1k 0.3×	234 0.3×	57 0.3×	131 0.7×	122	1.3k
Jiaxue You China	17	1.1k 0.3×	857 0.3×	92 0.1×	284 1.3×	215 1.1×	44	1.3k
D. P. Halliday United Kingdom	23	1.4k 0.4×	1.2k 0.4×	549 0.8×	71 0.3×	51 0.3×	79	1.7k
Young‐Woo Ok United States	24	1.4k 0.4×	1.0k 0.3×	576 0.8×	78 0.4×	312 1.6×	103	1.9k
П. П. Константинов Russia	19	692 0.2×	1.8k 0.5×	411 0.6×	62 0.3×	434 2.2×	105	1.9k
Jamo Momand Netherlands	21	1.3k 0.3×	1.4k 0.4×	90 0.1×	174 0.8×	128 0.6×	37	1.6k

Countries citing papers authored by Takayuki Negami

Since Specialization

Citations

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

Fields of papers citing papers by Takayuki Negami

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takayuki Negami

This figure shows the co-authorship network connecting the top 25 collaborators of Takayuki Negami. A scholar is included among the top collaborators of Takayuki Negami 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 Takayuki Negami. Takayuki Negami 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

Mavlonov, Abdurashid, et al.. (2025). Investigating the stability of flexible perovskite solar cell modules in heat and damp-heat environments. Solar Energy Materials and Solar Cells. 282. 113410–113410. 3 indexed citations

Ishizuka, Shogo, Yukiko Kamikawa, Jiro Nishinaga, et al.. (2025). Durability of encapsulated Cu(In,Ga)Se2 solar cells using high barrier flexible front sheet under damp heat conditions testing. Solar Energy Materials and Solar Cells. 294. 113873–113873.

Mavlonov, Abdurashid, et al.. (2024). Perovskite solar cell modules: Understanding the device degradation via damp heat testing. Solar Energy. 286. 113174–113174. 4 indexed citations

Mavlonov, Abdurashid, et al.. (2024). Thermal stability test on flexible perovskite solar cell modules to estimate activation energy of degradation on temperature. Solar Energy Materials and Solar Cells. 277. 113148–113148. 14 indexed citations

Mori, H., Jakapan Chantana, Yu Kawano, Takayuki Negami, & Takashi Minemoto. (2023). Influence of silver introduction into (Ag,Cu)(In,Ga)S2 thin films on their physical properties. Materials Science and Engineering B. 297. 116758–116758. 3 indexed citations

Chantana, Jakapan, Yu Kawano, Takahito Nishimura, et al.. (2022). Mg Content Impact of a Sputtered Zn_1–xMg_xO:Al Transparent Electrode on Photovoltaic Performances of Flexible, Cd-Free, and All-Dry-Process Cu(In,Ga)(S,Se)₂ Solar Cells. ACS Applied Energy Materials. 5(2). 2270–2278. 7 indexed citations

Chantana, Jakapan, Yu Kawano, Takahito Nishimura, et al.. (2022). Formation of Native In_x(O,S)_yBuffer through Surface Oxidation of Cu(In,Ga)(S,Se)₂Absorber for Significantly Enhanced Conversion Efficiency of Flexible and Cd‐Free Solar Cell by All‐Dry Process. Solar RRL. 6(7). 7 indexed citations

Kawano, Yu, Jakapan Chantana, Takayuki Negami, et al.. (2021). Theoretical impacts of single band gap grading of perovskite and valence band offset of perovskite/hole transport layer interface on its solar cell performances. Solar Energy. 231. 684–693. 10 indexed citations

Negami, Takayuki, et al.. (2012). Fabrication and Characterization of Wide-Gap ZnCuInS₂ Solar Cells. Japanese Journal of Applied Physics. 51(10S). 10NC06–10NC06. 3 indexed citations

10.

Hashimoto, Yasuhiro, et al.. (2008). Annealing effects on Zn1−xMgxO/CIGS interfaces characterized by ultraviolet light excited time-resolved photoluminescence. Solar Energy Materials and Solar Cells. 92(9). 1086–1090. 59 indexed citations

11.

Hayashi, Shigeo, et al.. (2006). Characterization of Cu(In,Ga)Se₂ thin films by time‐resolved photoluminescence. physica status solidi (a). 203(11). 2630–2633. 38 indexed citations

12.

Hashimoto, Yasuhiro, et al.. (2003). High efficiency CIGS solar cell on flexible stainless steel. 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of. 1. 574–577. 14 indexed citations

13.

Nishiwaki, Shiro, Takuya Satoh, Yasuhiro Hashimoto, et al.. (2003). Preparation of Zn doped Cu(In,Ga)Se2 thin films by physical vapor deposition for solar cells. Solar Energy Materials and Solar Cells. 77(4). 359–368. 19 indexed citations

14.

Satoh, T., et al.. (2002). Cu(In,Ga)Se solar cells on stainless steel substrates covered with insulating layers. Solar Energy Materials and Solar Cells. 75(1-2). 65–71. 32 indexed citations

15.

Wada, Takahiro, Naoki Kohara, Takayuki Negami, & Mikihiko Nishitani. (1997). Growth of CuInSe₂ crystals in Cu-rich Cu–In–Se thin films. Journal of materials research/Pratt's guide to venture capital sources. 12(6). 1456–1462. 63 indexed citations

16.

Nishiwaki, Shiro, Naoki Kohara, Takayuki Negami, Mikihiko Nishitani, & Takahiro Wada. (1997). Characterization of Cu(In,Ga)Se₂/Mo Interface in CIGS Solar Cells. MRS Proceedings. 485. 12 indexed citations

17.

Negami, Takayuki, Naoki Kohara, Mikihiko Nishitani, Takahiro Wada, & Takashi Hirao. (1995). Preparation and characterization of Cu(In1−xGax)3Se5 thin films. Applied Physics Letters. 67(6). 825–827. 97 indexed citations

18.

Kohiki, Shigemi, Mikihiko Nishitani, Takayuki Negami, & Takahiro Wada. (1993). Valence manipulation and homojunction diode fabrication of chalcopyrite structure CuInSe thin films. Thin Solid Films. 226(1). 149–155. 7 indexed citations

19.

Nishitani, Mikihiko, Takayuki Negami, M. Terauchi, Takahiro Wada, & Takashi Hirao. (1992). Fabrication of P-Type Cuinse2 Thin Film by MBD Using ECR Excited Nitrogen Ion Source. MRS Proceedings. 268.

20.

Kohiki, Shigemi, et al.. (1992). Characterization of molecular beam deposited CuInSe2 thin films. Thin Solid Films. 207(1-2). 265–269. 27 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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