An efficient planar-heterojunction solar cell based on wide-bandgap CH3NH3PbI2.1Br0.9 perovskite film for tandem cell application
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Updated: Mar 31, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Weidong Zhu1, Chunxiong Bao, Faming Li
1National Laboratory of Solid State Microstructures & Eco-Materials and Renewable Energy Research Center (ERERC) at the Department of Physics, Nanjing University, Nanjing 210093, P. R. China. yutao@nju.edu.cn.
Abstract:
A dense and homogenous flat wide-bandgap (1.75 eV) CH3NH3PbI2.1Br0.9 perovskite film was prepared via a facile halide exchange route. The planar-heterojunction solar cell shows an optimal power conversion efficiency of 12.67% with negligible current hysteresis due to the film's large grains and vertically oriented grain boundaries.
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