Finely modulated asymmetric nonfullerene acceptors enabling simultaneously improved voltage and current for efficient organic solar cells

Autor:	Yongsheng Chen, Huan-Huan Gao, Wei Ma, Jingming Xin, Ziyi Xuan, Xiangjian Wan, Chenxi Li
Rok vydání:	2022
Předmět:	Materials science Organic solar cell business.industry Energy conversion efficiency Photovoltaic system General Chemistry Molecular configuration Acceptor Active layer Materials Chemistry Side chain Optoelectronics business Current density
Zdroj:	Journal of Materials Chemistry C. 10:2742-2748
ISSN:	2050-7534 2050-7526
DOI:	10.1039/d1tc03793e
Popis:	It is a great challenge to simultaneously improve the short-circuit current density (Jsc) and open-circuit voltage (Voc) of organic solar cells (OSCs) owing to the trade-off effect between the two photovoltaic parameters. Delicate chemical structure modulation of the active layer materials is always one of the effective strategies to address this issue. In this work, following a simple and efficient strategy through fine-tuning the molecular configuration in combination with the side chain modulation to address the issue, three non-fullerene acceptors (NFAs), 5T-2C8-IN, 5T-2C8-Cl and 5T-2C8-2Cl with a five-thiophene (5T) fused asymmetric molecular backbone and octyl side chains at the terminal position of the molecular backbone, have been designed and synthesized. Among them, the 5T-2C8-2Cl based photovoltaic device showed a power conversion efficiency (PCE) of 13.02% with a simultaneously improved Voc of 0.802 V and a Jsc of 24.97 mA cm−2 compared with the device of the control acceptor 6T-2C8-2Cl with a PCE of 12.43%, a Voc of 0.785 V and a Jsc of 24.40 mA cm−2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e0729f92f93c336cf08c9cec63a769d https://doi.org/10.1039/d1tc03793e Zobrazit plný text záznamu