NDLI: Hysteresis-free low-temperature-processed planar perovskite solar cells with 19.1% efficiency

Content Provider	Royal Society of Chemistry (RSC)
Author	Choi, Mansoo Kang, Seong Min Yoon, Heetae Lee, Jong-Kwon
Copyright Year	2016
Abstract	Hysteresis-free, highly efficient and stable perovskite solar cells processed at low temperatures are strongly demanded to realize flexible or perovskite-based tandem solar cells. Here, we report a hysteresis-free planar CH3NH3PbI3 perovskite solar cell with a power conversion efficiency of 19.1% using a room-temperature vacuum-processed C60 electron transport layer (ETL) without the hole blocking layer. By optimizing the thickness of the C60 layer, the highly homogeneous, uniform, and dense ETL with a thickness of 35 nm is found to not only passivate the grain boundaries and surfaces of the perovskite layer, but also enhance charge transport properties. Thus, the C60 layer deposited on perovskites eliminates the photocurrent hysteresis and improves the cell efficiency. Also, compared to the device adopting the C60 and bathocuproine (BCP) combination, the one with the C60 layer without the BCP layer shows better performance due to enhanced electron extraction properties. Furthermore, for the first time, we have demonstrated a hysteresis-free flexible perovskite solar cell using the C60 ETL on a polyethylene naphthalate (PEN) substrate with 16.0% efficiency.
Starting Page	2262
Ending Page	2266
Page Count	5
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	9
Issue Number	7
Journal	Energy & Environmental Science
DOI	10.1039/c6ee01037g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	BCP Perovskite Perovskite solar cell Expected shortfall Crystallite Photocurrent Hysteresis Polyethylene naphthalate
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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