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Low-temperature solution-processed Li-doped SnO2 as an effective electron transporting layer for high-performance flexible and wearable perovskite solar cells

Cited 408 time in Web of Science Cited 426 time in Scopus
Authors

Park, Minwoo; Kim, Jae-Yup; Son, Hae Jung; Lee, Chul-Ho; Jang, Seung Soon; Ko, Min Jae

Issue Date
2016-08
Publisher
Elsevier BV
Citation
Nano Energy, Vol.26, pp.208-215
Abstract
Lead halide perovskite solar cells (PSCs) are thought to be promising energy power suppliers because of their feasibility for high power conversion efficiency (PCE), light weight, and flexible architecture. The preparation of charge transporting layers at low temperature has been essential for high-performance and flexible PSCs. Recently, low-temperature-processed metal oxides have been a desirable material for charge transport and air stability for PSCs, instead of organic semiconductors. However, pristine metal oxides fabricated at low temperature have still precluded high performance of the device because of their low conductivity and large deviation in energy levels from the conduction band or valance band of the perovskite. Therefore, doping metals in the metal oxides has been considered as an effective method to endow suitable electrical properties. Herein, we developed a highly efficient electron transporting layer (ETL) comprising Li-doped SnO2 (Li:SnO2) prepared at low temperature in solution. The doped Li in SnO2 enhanced conductivity as well as induced a downward shift of the conduction band minimum of SnO2, which facilitated injection and transfer of electrons from the conduction band of the perovskite. The PCE was measured to be 18.2% and 14.78% for the rigid and flexible substrates, respectively. The high-performance and flexible PSCs could be potentially used as a wearable energy power source. (C) 2016 Elsevier Ltd. All rights reserved.
ISSN
2211-2855
URI
https://hdl.handle.net/10371/202290
DOI
https://doi.org/10.1016/j.nanoen.2016.04.060
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  • College of Engineering
  • Department of Electrical and Computer Engineering
Research Area 2차원 반도체 소자 및 재료, High-Performance 2D Electronics, Low-Power 2D Electronics, 뉴로모픽 소자 및 응용기술, 저전력 소자 및 소자물리

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