DOI: 10.1016/j.scib.2020.08.041
论文题名: Efficient and stable inverted perovskite solar cells enabled by inhibition of self-aggregation of fullerene electron-transporting compounds
作者: Tian C. ; Betancourt-Solis G. ; Nan Z. ; Liu K. ; Lin K. ; Lu J. ; Xie L. ; Echegoyen L. ; Wei Z.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期: 4 起始页码: 339
结束页码: 346
语种: 英语
中文关键词: 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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170407
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Science Bulletin,2021-01-01,66(4)