Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 18, Pages 15933-15942Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02256
Keywords
p-i-n perovskite solar cell; interface engineering; cathode interlayer; degradation; interfacial recombination
Funding
- Natural Science Foundation of China [51372158, 51772195, 61705150, 21503203]
- Natural Science Foundation of Jiangsu Province [BK20160325]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies
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A simple alcohol-soluble perylene derivative (i.e., tetramethylammonium salt of perylene-3,4,9,10-tetracarboxylic acid; TMA-PTC) was prepared and applied as a cathode interlayer (CIL) to modify the PC61BM/Ag interface in planar p-i-n perovskite solar cells (PeSCs). As a result, the power conversion efficiency (PCE) of the TMA-PTC-based PeSCs is ca. 30% higher than that of the devices without CM. It was revealed that the enhancement in PCE might be attributed to the improved electron-transporting and hole-blocking properties of the PC61BM/TMA-PTC/Ag interfaces. Moreover, the TMA-PTC devices show remarkably higher stability than those without CIL probably due to the suppressed corrosion of perovskite on Ag cathode. Our findings thus demonstrate a multifunctional and solution-processable CIL that may be a promising block for the fabrication of low-cost, high-efficiency and stable planar p-i-n PeSCs.
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