A low boiling-point and low-cost fluorinated additive improves the efficiency and stability of organic solar cells

Autor:	Yongfang Li, Changduk Yang, Shanshan Chen, Lei Meng, Jinyuan Zhang, Zhanjun Zhang, Shaman Li, Qing Ma
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Materials science Organic solar cell Energy conversion efficiency Photovoltaic system Stacking General Chemistry Polymer Acceptor Boiling point chemistry Chemical engineering Boiling Materials Chemistry
Zdroj:	Journal of Materials Chemistry C. 8:15296-15302
ISSN:	2050-7534 2050-7526
DOI:	10.1039/d0tc03217d
Popis:	The application of high-performance organic solar cells (OSCs) requires high efficiency, high stability and low-cost devices. Herein, we propose a low boiling-point and low-cost additive 1,4-difluorobenzene (DFB) with a boiling point of 88.8 °C to optimize the morphology of the active layer of the OSCs based on conjugated polymer J71 as a donor and n-type small molecule m-ITTC as an acceptor. The DFB additive treatment enhances intermolecular π–π stacking of the photovoltaic materials, which is conducive to charge carrier separation and transport. The power conversion efficiency (PCE) of the OSCs based on J71:m-ITTC with the DFB additive treatment increased to 12.38% from 11.01% for the device without the additive treatment. Furthermore, the OSCs with the additive treatment also showed higher stability. The results indicate that 1,4-difluorobenzene will be a promising low cost additive for commercial application of OSCs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56d683cf0920f8ef861ec20a97e10bd3 https://doi.org/10.1039/d0tc03217d Zobrazit plný text záznamu