期刊
JOURNAL OF POWER SOURCES
卷 331, 期 -, 页码 240-246出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.09.057
关键词
Perovskite; Cesium carbonate; Double interlayers; Electron injection barrier; Work founction
资金
- Chinese Nature Science Foundation Committee [61307036, 61177016]
- Henan normal university youth backbone teachers [5101029470611]
- Universities in Henan Province Key research project [17A140020]
This work proposes a new perovskite solar cell structure by inserting the double modified interlayers consisting of the 4,7-diphenyl-1,10-phenanthroline (Bphen) and cesium carbonate (Cs2CO3)-MoO3 layer between perovskite (CH3NH3PbI3-xClx)/PCBM (phenyl-C61-butyric acid methylester) and an Ag electrode. The double interlayers improve the photovoltaic efficiency to 15.59%, which is higher than that of reference devices with Bphen (13.41%) or alone, the champion PCE of 16.01% is obtained. The enhanced opening circuit voltage (V-oc) is ascribed as the main factor to improve the efficiency. Further studies show, the reduced work function of cathode by means of the Cs2CO3-MoO3 could effectively extract the electrons and reduce the carrier recombination and thus result in a higher V-oc. (C) 2016 Elsevier B.V. All rights reserved.
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