气候变化领域集成服务门户(CCPortal): Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds

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DOI	10.1016/j.scib.2020.08.041
	Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds
	Tian C.; Betancourt-Solis G.; Nan Z.; Liu K.; Lin K.; Lu J.; Xie L.; Echegoyen L.; Wei Z.
发表日期	2021
ISSN	20959273
起始页码	339
结束页码	346
卷号	66 期号:4
英文摘要	Fullerene-based electron-transporting layers (ETLs) significantly influence the defect passivation and device performance of inverted perovskite solar cells (PSCs). However, the π-cage structures of fullerenes lead to a strong tendency to self-aggregate, which affects the long-term stability of the corresponding PSCs. Experimental results revealed that [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)-based ETLs exhibit a certain degree of self-aggregation that affects the stability of the device, particularly under continuous irradiation stress. To modulate the aggregation behavior, we replaced a methyl hydrogen of PCBM with a phenyl group to yield [6,6]-phenyl-C61-butyric acid benzyl ester (PCBB). As verified through X-ray crystallography, this minor structural modification results in more non-covalent intermolecular interactions, which effectively enhanced the electron-transporting ability of the PCBB-based ETL and led to an efficiency approaching 20%. Notably, the enhanced intermolecular forces of PCBB suppressed its self-aggregation, and the corresponding device showed significantly improved stability, retaining approximately 90% of its initial efficiency after 600 h under one-sun irradiation with maximum power point tracking. These findings provide a viable approach for the design of new fullerene derivatives to tune their intermolecular interactions to suppress self-aggregation within the ETL for high-performance PSCs. © 2020 Science China Press
关键词	Functionalized fullerene Intermolecular interaction Inverted perovskite solar cells Operation stability Self-aggregation
英文关键词	Butyric acid; Chemical bonds; Efficiency; Esters; Fullerenes; Irradiation; Maximum power point trackers; Perovskite; X ray crystallography; Aggregation behavior; Electron transporting; Electron transporting layer; Inter-molecular forces; Intermolecular interactions; Maximum Power Point Tracking; Structural modifications; [6 ,6]-phenyl-C61-butyric acid methyl esters; Perovskite solar cells
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207573
作者单位	Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China; Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, United States; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
推荐引用方式 GB/T 7714	Tian C.,Betancourt-Solis G.,Nan Z.,et al. Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds[J],2021,66(4).
APA	Tian C..,Betancourt-Solis G..,Nan Z..,Liu K..,Lin K..,...&Wei Z..(2021).Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds.Science Bulletin,66(4).
MLA	Tian C.,et al."Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds".Science Bulletin 66.4(2021).