Open AccessReduced Defects and Enhanced Performance of (FAPbI3)0.97(MAPbBr3)0.03-Based Perovskite Solar Cells by Trimesic Acid Additives
Author(s) -
Hoang Van Quy,
Dang Hai Truyen,
Sangmo Kim,
Chung Wung Bark
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c01909
Subject(s) - perovskite (structure) , materials science , trihalide , passivation , surface roughness , scanning electron microscope , trimesic acid , halide , energy conversion efficiency , chemical engineering , layer (electronics) , grain size , grain boundary , nanotechnology , optoelectronics , composite material , inorganic chemistry , chemistry , microstructure , organic chemistry , molecule , engineering
A high-quality organolead trihalide perovskite film with large-sized crystalline grains and smooth surfaces is required to obtain efficient perovskite solar cells (PSCs). Herein, high-quality (FAPbI 3 ) 0.97 (MAPbBr 3 ) 0.03 perovskite films were fabricated using trimesic acid (TMA) additives in a halide perovskite precursor solution to obtain efficient PSCs. The X-ray diffraction analysis and scanning electron microscopy of the films revealed that the TMA had a significant effect on the roughness of the films by acting as a surface link, thus reducing the surface defects and recombination at the grain boundaries. In addition, with the addition of the TMA additive, a smooth perovskite film with a flat surface and no pinholes was obtained. The perovskite film was used to fabricate a PSC device, and the device exhibited a high power conversion efficiency of 17.26%, which was higher than that of the control device (15.15%) under the same conditions. This study demonstrates a facile method to passivate defects on the perovskite layer via surface modification.