K
Kenichiro Ohya
Researcher at Sumitomo Chemical
Publications - 14
Citations - 4270
Kenichiro Ohya is an academic researcher from Sumitomo Chemical. The author has contributed to research in topics: Ring (chemistry) & Energy conversion efficiency. The author has an hindex of 8, co-authored 14 publications receiving 4141 citations.
Papers
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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.
Journal ArticleDOI
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.
Patent
Polymer compound, and thin film and ink composition each containing same
Kazuo Takimiya,和男 瀧宮,Itaru Osaka,格 尾坂,Kenji Kohiro,健司 小廣,Kenichiro Ohya,健一郎 大家,Kunihito Miyake,邦仁 三宅 +9 more
TL;DR: In this paper, the polymer compound of the present invention has a repeating unit represented by the formula (1): wherein Ar1 and Ar2 are each an aromatic hydrocarbon ring, a heterocycle, or a fused ring of an aromatic polycarbon ring and a HOG.