K
Ken Yoshimura
Researcher at Sumitomo Chemical
Publications - 62
Citations - 4690
Ken Yoshimura is an academic researcher from Sumitomo Chemical. The author has contributed to research in topics: Electrolyte & Substituent. The author has an hindex of 12, co-authored 62 publications receiving 4549 citations. Previous affiliations of Ken Yoshimura include Tottori University.
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Journal ArticleDOI
A polymer tandem solar cell with 10.6% power conversion efficiency
Jingbi You,Letian Dou,Ken Yoshimura,Takehito Kato,Kenichiro Ohya,Tom Moriarty,Keith Emery,Chun-Chao Chen,Jing Gao,Gang Li,Yang Yang +10 more
TL;DR: The development of a high-performance low bandgap polymer that enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions, which is the first certified polymer solar cell efficiency over 10%.
Journal ArticleDOI
An Efficient Triple‐Junction Polymer Solar Cell Having a Power Conversion Efficiency Exceeding 11%
Chun-Chao Chen,Wei-Hsuan Chang,Ken Yoshimura,Kenichiro Ohya,Jingbi You,Jing Gao,Zirou Hong,Yang Yang +7 more
TL;DR: A triple-junction tandem design is demonstrated by employing three distinct organic donor materials having bandgap energies ranging from 1.4 to 1.9 eV and can exhibit a record-high PCE of 11.5%.
Journal ArticleDOI
10.2% Power Conversion Efficiency Polymer Tandem Solar Cells Consisting of Two Identical Sub-Cells
Jingbi You,Chun-Chao Chen,Ziruo Hong,Ken Yoshimura,Kenichiro Ohya,Run Xu,Shenglin Ye,Jing Gao,Gang Li,Yang Yang +9 more
TL;DR: Polymer tandem solar cells with 10.2% power conversion efficiency are demonstrated via stacking two PDTP-DFBT:PC₇₁ BM bulk heterojunctions, connected by MoO₃/PEDOT:PSS/ZnO as an interconnecting layer.
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Synthesis of 5H-Dithieno[3,2-b:2′,3′-d]pyran as an Electron-Rich Building Block for Donor–Acceptor Type Low-Bandgap Polymers
Letian Dou,Chun-Chao Chen,Ken Yoshimura,Kenichiro Ohya,Wei-Hsuan Chang,Jing Gao,Yongsheng Liu,Eric Richard,Yang Yang +8 more
TL;DR: The electron-donating property of the DTP unit was found to be the strongest among the most frequently used donor units such as benzodithiophene (BDT) or cyclopentadithiophen (CPDT) units in low-bandgap conjugated polymers as mentioned in this paper.
Journal ArticleDOI
Direct arylation polycondensation for the synthesis of bithiophene-based alternating copolymers
Junpei Kuwabara,Yuta Nohara,Seong Jib Choi,Yohei Fujinami,Wei Lu,Ken Yoshimura,Jun Oguma,Katsuhiro Suenobu,Takaki Kanbara +8 more
TL;DR: In this paper, the conditions for the reactions of 3,3′,4,4′-tetramethylbithiophene with dibromoarylenes were optimized to obtain high-molecular-weight polymers without formation of cross-linked structures.