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High-Performance and Stable Mesoporous Perovskite Solar Cells via Well-Crystallized FA(0.85)MA(0.15)Pb(I0.8Br0.2)(3)


Indexed by:Journal Papers

First Author:Wang, Minhuan

Correspondence Author:Bian, JM (reprint author), Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Sch Phys, Dalian 116024, Peoples R China.; Shi, YT (reprint author), Dalian Univ Technol, Sch Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China.

Co-authors:Jiang, Xiaoqing,Bian, Jiming,Feng, Yulin,Wang, Chen,Huang, Yang,Zhang, Yadong,Shi, Yantao

Date of Publication:2019-01-23


Included Journals:SCIE



Page Number:2989-2996

ISSN No.:1944-8244

Key Words:metal halide perovskite; solar cells; antisolvent spin-coating grain boundaries; stability

Abstract:The overall performance of perovskite solar cells (PSCs) depends particularly on the chemical composition and crystalline quality of the perovskite light harvester. Here, the well-crystallized mixed-cation lead mixed-halide perovskite films with the optimized composition of FA(0.85)MA(0.15)Pb-(I0.8Br0.2)(3) were achieved by antisolvent-assisted single-step spin-coating in ambient conditions. The resulting PSCs with the well-crystallized FA(0.85)MA(0.15)Pb(I0.8Br0.2)(3) exhibit impressive power conversion efficiency (PCE) over 20% under standard AM 1.5 illumination with excellent reproducibility. Remarkably, no perceivable degradation in PCE was detected from the PSCs stored in ambient conditions without any encapsulation after 7000 h (nearly 300 days), which was among the best shelf stability ever reported for PSCs. The superior performance was mainly attributed to the improved structural quality of the FA(0.85)MA(0.15)Pb(I0.8Br0.2)(3) layer with reduced grain boundaries, reduced trap-state density, and prolonged carrier lifetime, as well as the better intrinsic stability of the mixed perovskite with an optimized composition.

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