Indexed by:期刊论文

Date of Publication:2017-10-01

Journal:SCIENCE CHINA-MATERIALS

Included Journals:SCIE、EI

Volume:60

Issue:10

Page Number:963-976

ISSN No.:2095-8226

Key Words:SnO2; interfacial synergism; electron transfer layer; perovskite; solar cell

Abstract:Here, the interfacial synergism of discontinuous spot shaped SnO2 and TiO2 mesoporous nanocomposite as electron transfer layer (ETL) underlayer is presented in highly efficient mesoscopic perovskite solar cells (M-PSCs). Based on this new strategy, strong charge recombination observed in previous SnO2-based ETLs is suppressed to a great extent as the pathways of charge recombination and energy loss are blocked effectively. Meanwhile, the internal series resistance of entire M-PSC is decreased remarkably. The new ETL is more kinetically favorable to electron transfer and thus results in significant photovoltaic improvement and alleviated hysteresis effect of M-PSCs.