期刊
CHEMSUSCHEM
卷 12, 期 6, 页码 1155-1161出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201802421
关键词
electron transport; energy conversion; perovskites; polycycles; solar cells
资金
- National Natural Science Foundation of China [51573026, 21574021]
- Natural Science Foundation of Fujian Province [2016J01211]
- Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology) [2017-skllmd-11]
- Program for Innovative Research Team in Science and Technology in Fujian Province University (IRTSTFJ)
Perylene diimide-based small molecules are widely used as intermediates of liquid crystals, owing to their high planarity and electron mobility. In this study, tetrachloroperylene diimide (TCl-PDI) was used as a small-molecule replacement for TiO2 as electron-transporting material (ETM) for planar perovskite solar cells (PVSCs). Among hole-transporting materials (HTMs) for PVSCs, poly(3-hexylthiophene) (P3HT) gives the devices the highest stability and reproducibility. Therefore, PVSCs with the structure of indium tin oxide (ITO)/ETM/perovskite/P3HT/MoO3/Ag were used to evaluate the performances of new ETMs. A reference device with compact TiO2 and P3HT gave a reasonable power conversion efficiency (PCE) of 12.78 %, whereas the PVSC with TCl-PDI as ETM gave an enhanced PCE of 14.73 %, which is among the highest reported values for PVSCs with undoped P3HT as the HTM. Moreover, TCl-PDI-based devices displayed higher stability than those based on compact TiO2, owing to the superior perovskite quality.
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