Journal
ORGANIC ELECTRONICS
Volume 52, Issue -, Pages 200-205Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2017.10.028
Keywords
None-fullerene small molecule; Green solvent; p-i-n perovskite solar cells
Funding
- Shenzhen Science and Technology Research Grant [JCYJ20160510144254604]
- Shenzhen Hong Kong Innovation Circle joint R D project [SGLH20161212101631809]
- National Basic Research Program of China (973 Program) [2015CB856505]
- Guangdong Academician Workstation, Shenzhen Science and Technology Research Grant [JCYJ20150629144328079, JCYJ20150331100628880]
- Shenzhen Key Lab [ZDSY 201505291525382]
- Shenzhen Peacock Plan [KQTD20140630110339343]
- China (Shenzhen)-Israel Technology Collaboration Project [GJHZ20170313145720459]
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We discovered that an alcohol soluble non-fullerene small molecule perylene diimides derivative (PDIN), which is a traditional cathode interface material, can be used as a promising electron transporting material for efficient p-i-n perovskite solar cells. Surprisingly, by using 2,2,2-Trifluoroethanol as solvent for PDIN, it can easily form high quality PDIN thin film onto the perovskite layer and overcome the erosion problem of conventional alcohol solvents such as methanol and ethanol etc. In addition, PDIN can efficiently quench the photoluminescence of perovskite layer and extract electrons from perovskite layer. Finally, a power conversion efficiency of 15.28% is achieved from the device with PDIN as electron transporting layer, which is significantly higher than the PC61BM only device. Further, we also found that the performance of the device with PDIN as electron transporting layer is not sensitive to the PDIN's thickness. These results indicate that PDIN is a promising electron transporting material for efficient p-i-n perovskite solar cells.
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