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A Low‐Temperature, Solution Processable Tin Oxide Electron‐Transporting Layer Prepared by the Dual‐Fuel Combustion Method for Efficient Perovskite Solar Cells
Author(s) -
Liu Xiao,
Tsai KaiWei,
Zhu Zonglong,
Sun Ye,
Chueh ChuChen,
Jen Alex K.Y.
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600122
Subject(s) - materials science , tin oxide , chemical engineering , energy conversion efficiency , perovskite (structure) , combustion , tin , oxide , nanotechnology , optoelectronics , organic chemistry , metallurgy , chemistry , engineering
Although tin oxide (SnO 2 ) has been employed recently as an efficient electron‐transporter to realize highly efficient organometal halide perovskite solar cells (PVSCs), it is still quite challenging to apply it through facile solution‐based synthesis at low enough temperature (<150 °C) to be compatible with the roll‐to‐roll printing on polymer substrates. In this work, a dual‐fuel combustion method has been successfully adapted to modulate the exothermic characteristics and processing temperature (140 °C) of SnO 2 to achieve homogeneous and crystalline thin film as efficient electron‐transporting layer for PVSCs. The fabricated SnO 2 film not only has high transparency (from 350 nm to near‐infrared region) but also possesses good electron extraction ability, as evidenced by the efficient PL quenching in bilayered SnO 2 /CH 3 NH 3 PbI 3 film. By passivating SnO 2 surface with a C 60 ‐containing self‐assembled monolayer (C 60 ‐SAM), a high power conversion efficiency (PCE max ) of >15% with negligible hysteresis can be achieved in PVSC. This demonstrates the great potential of applying this dual‐fuel combustion process to improve processability and charge‐transporting properties of metal oxides for organic electronics applications.