Achieving high short-circuit current and fill-factor via increasing quinoidal character on nonfullerene small molecule acceptor
文献类型：期刊论文
| 作者 | Liu, Wenxu; Li, Weiping; Yao, Jiannian; Zhao, Chuanlang |
| 刊名 | CHINESE CHEMICAL LETTERS
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 29期号:3页码:381-384 |
| 关键词 | Nonfullerene Small Molecule Acceptor Polymer Solar Cell Cyclopenta[c]Thiophen-4-one-5-methylene-6-(1 1-dicyanomethylene) |
| ISSN号 | 1001-8417 |
| DOI | 10.1016/j.cclet.2017.11.018 |
| 英文摘要 | Recently, the fused-ring based low band gap (LBG) small molecule acceptors (SMAs) have emerged as efficient nonfullerene acceptors. So far, these LBG. SMAs are mainly designed with IC (2-methylene-(3-(1,1-dicyanomethylene)indanone)) or its analogs, the benzo-type electron-accepting (A) units. Compared to benzene, thiophene is less aromatic and thus the thiophene-involving semiconducting molecule has more quinoidal character, which effectively reduces the energy gap between the highest occupied molecular orbit (HOMO) and the lowest unoccupied molecular orbit (LUMO). Herein, we show that replacing the IC units in ITIC with the CT (cyclopenta[c]thiophen-4-one-5-methylene-6-(1,1-dicyanomethylene)), a thiophene-fused A unit, the quinoidal character is enhanced from 0.0353 on ITIC to 0.0349 on ITCT, the CT-ended SMA. The increase in the quinoidal character reduces the optical band gap and enhances the near IR absorptivity. When blended with the wide band gap (WBG) polymer donor, PBDB-T, an average power conversion efficiency of 10.99% is obtained with a short-circuit current-density (J(sc)) of 17.88 mA/cm(2) and a fill-factor (FF) of 0.723. For comparisons, the J(sc) is of 16.92 mA/cm(2), FF is of 0.655 and PCE is of 9.94% obtained from the ITIC:PBDB-T device. This case indicates that the replacement of the benzene ring on the IC unit with a more polarizable five-member ring such as thiophene is an effective way to enhance the absorption of the near IR solar photons towards designing high-performance nonfullerene polymer solar cells. (C) 2017 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000429392800009 |
| 出版者 | ELSEVIER SCIENCE INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/46237]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhao, Chuanlang |
| 作者单位 | Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Photochem, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Wenxu,Li, Weiping,Yao, Jiannian,et al. Achieving high short-circuit current and fill-factor via increasing quinoidal character on nonfullerene small molecule acceptor[J]. CHINESE CHEMICAL LETTERS,2018,29(3):381-384. |
| APA | Liu, Wenxu,Li, Weiping,Yao, Jiannian,&Zhao, Chuanlang.(2018).Achieving high short-circuit current and fill-factor via increasing quinoidal character on nonfullerene small molecule acceptor.CHINESE CHEMICAL LETTERS,29(3),381-384. |
| MLA | Liu, Wenxu,et al."Achieving high short-circuit current and fill-factor via increasing quinoidal character on nonfullerene small molecule acceptor".CHINESE CHEMICAL LETTERS 29.3(2018):381-384. |
入库方式： OAI收割
来源：化学研究所
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