期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 11, 页码 6213-6219出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta11841h
关键词
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资金
- National Natural Science Foundation of China [51673139, 91633301]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
In planar n-i-p perovskite solar cells (Pero-SCs), interfacial engineering plays a critically important role in charge extraction and transportation, and hence influences the photovoltaic performances. In this study, high performance Pero-SCs were realized by introducing SnO2/2D TiS2 double structures as electron transport layers (ETLs). The highest power conversion efficiency (PCE) reached 21.73% (average PCE is 20.48 +/- 0.50%) with quite small hysteresis. The improvement of performance is mainly attributed to the facilitated charge transportation due to the match of energy levels and decreased electron trap state densities of ETL films. This work provides not only a promising interfacial material, but also a feasible clue to alleviate the trap states of SnO2 in planar n-i-p Pero-SCs.
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