期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 37, 页码 34408-34415出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b09018
关键词
fullerene derivatives; thiophene; pyridine; electron transporting materials; perovskite solar cells; interfacial interactions
资金
- US National Science Foundation (NSF) under the NSF-PREM program [DMR 1205302]
- US National Science Foundation (NSF) [CHE-1408865, 1401188]
- Robert A. Welch Foundation [AH-0033]
- National Science Foundation [DMR-1720256]
- Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research Award under the EERE Solar Energy Technologies Office [DE-SC00014664]
- National Key Research and Development Program of China [2016YFA0200602, 2018YFA0208603]
- NSFC [21573204, 21421063]
- Anhui Initiative in Quantum Information Technologies
- Fundamental Research Funds for the Central Universities
The synthesis, characterization, and incorporation of phenyl-C-61-butyric acid methyl ester (PC61BM)-like derivatives as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs) are reported. These compounds have the same structure except for the ester substituent, which was varied from methyl to phenyl to thienyl and to pyridyl. The three latter derivatives performed better than PC61BM in PSCs, mainly attributed to the specific interactions of the fullerenes with the perovskite layer, as evidenced by X-ray photoelectron spectroscopy (XPS) and steady-state and time-resolved photoluminescence (SS- and TRPL) measurements. The experimental results were fully supported by density functional theory (DFT) calculations, which showed that the strongest interactions were exhibited by the compound possessing the pyridyl substituent.
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