journal article·2017-09-08

Water Vapor Treatment of Low-Temperature Deposited SnO2 Electron Selective Layers for Efficient Flexible Perovskite Solar Cells

Changlei Wang, Lei Guan, Dewei Zhao, Yue Yu, Corey R. Grice, Zhaoning Song, Rasha A. Awni, Jing Chen, Jianbo Wang, Xingzhong Zhao, Yanfa Yan

ACS Energy Letters· Volume 2· Issue 9
Publisher page

Abstract

Tin oxide (SnO 2 ) electron selective layers (ESLs) processed by low-temperature plasma-enhanced atomic layer deposition (PEALD) hold promise for fabricating lightweight and efficient flexible lead halide perovskite solar cells (PVSCs). However, the as-synthesized SnO 2 ESLs typically lead to flexible PVSCs with lower open-circuit voltage ( V OC ) and fill factor (FF) as well as a higher degree of current density–voltage ( J – V ) hysteresis, compared to PVSCs fabricated on rigid substrates. Here, we report that facile water vapor treatment of PEALD-synthesized SnO 2 ESLs can effectively improve the V OC and FF while reducing the degree of J – V hysteresis. The improvement in device performance is mainly attributed to the improved conductivity and electrical mobility of SnO 2 ESLs enabled by water vapor treatment. With such treatment, our best flexible PVSC fabricated on a commercial substrate shows a power conversion efficiency of 18.36 (17.12)% when measured under a reverse (forward) voltage scan and a stabilized efficiency of 17.08%, which is the highest reported efficiency for flexible PVSCs with the regular structure.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics and Astronomy, and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, Ohio 43606, United States

Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China

School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China

School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China

Science and Technology of High Strength Structural Materials Laboratory, Central South University, Changsha 410083, China

Funding

Division of Chemistry · Ministry of Science and Technology of the People's Republic of China · Office of Naval Research · U.S. Department of Energy · National Natural Science Foundation of China · Division of Materials Research

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