Solution-processed Zn2SnO4 electron transporting layer for efficient planar perovskite solar cells

Wu, W, Chen, D, Li, F, Cheng, Y and Caruso, R 2018, 'Solution-processed Zn2SnO4 electron transporting layer for efficient planar perovskite solar cells', Materials Today Energy, vol. 7, pp. 260-266.


Document type: Journal Article
Collection: Journal Articles

Title Solution-processed Zn2SnO4 electron transporting layer for efficient planar perovskite solar cells
Author(s) Wu, W
Chen, D
Li, F
Cheng, Y
Caruso, R
Year 2018
Journal name Materials Today Energy
Volume number 7
Start page 260
End page 266
Total pages 7
Publisher Elsevier
Abstract The development of ternary metal oxide based electron transporting layers (ETLs) opens an alternative composition for constructing perovskite solar cells (PSCs). Herein, a solution processed route to prepare a dense and uniform Zn2SnO4 (ZTO) thin film is reported for use as an excellent alternative ETL material for high-performance planar PSCs. The ZTO film exhibits good antireflective properties, with significantly improved optical transmittance over the entire range of wavelengths. The ZTO ETL improves the quality of the methylammonium lead iodide (MAPbI3) layer, giving enhanced crystallinity and a flatter surface. The hole-blocking ability, suitable energy band positioning for MAPbI3 and high electron mobility of the ZTO films facilitate the charge extraction and collection at the ZTO/MAPbI3 interface and suppress the charge recombination through the planar PSC device. The best-performing PSC based on the optimized ZTO ETL thin film exhibits a champion power conversion efficiency of 16.38% under AM 1.5G one sun illumination (100 mW cm?2), indicating that ZTO is a promising ETL alternative for the construction of highly efficient perovskite photovoltaic devices. These ETL thin films have good optical and electrical properties, such as antireflection for maximized light harvesting as well as high electron mobility and interfacial band-alignment for charge collection.
Subject Physical Sciences not elsewhere classified
Keyword(s) Charge extraction
Interfacial recombination
Perovskite
Solar cells
Ternary metal oxide
DOI - identifier 10.1016/j.mtener.2017.12.006
Copyright notice © 2017 Elsevier Ltd. All rights reserved.
ISSN 2468-6069
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