Journal
JOURNAL OF POWER SOURCES
Volume 363, Issue -, Pages 317-326Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.07.112
Keywords
Perovskite solar cell; Isopropanol; Pinhole-free; Two-step deposition method; Planar heterojunction
Funding
- National Natural Science Foundation of China [21403152]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX07]
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As a promising photovoltaic device, perovskite solar cells have attracted numerous attention in recent years, where forming a compact and pinhole-free perovskite film in air is of great importance. Herein, we evaluate highly efficient and air stable planar perovskite solar cells in air (relative humidity over 50%) with the modified two-step sequential deposition method by adjusting the CH3NH3I (MAI) concentrations and regulating the crystallization process of the perovskite film. The optimum MAI concentration is 60 mg mL(-1) in isopropanol. With a planar structure of FTO/TiO2/MAPbI(3)/spiro-OMeTAD/Au, the efficient devices composed of compact and pinhole-free perovskite films are constructed in air, achieving a high efficiency of up to 15.10% and maintaining over 80% after 20 days storing without any encapsulation in air. With a facile fabrication process and high photovoltaic performance, this work represents a promising method for fabricating low-cost, highly efficient and stable photovoltaic device. (C) 2017 Elsevier B.V. All rights reserved.
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