TY  - EJOU
AU  - Hao, Yangyang 
AU  - Liu, Yue 
AU  - Cao, Guorui 

TI  - Grain Boundary Passivation Modulated by Molecular Doping for High-Performance Perovskite Solar Cells
T2  - Journal of Renewable Materials

PY  - 2022
VL  - 10
IS  - 12
SN  - 2164-6341

AB  - Aiming to reduce the defects of perovskite film and improve carrier transport, an organic small molecule, benzo
[d]isothiazol-3(2H)-one 1,1-dioxide (OBS), is introduced as an additive in the solution-processing of perovskite
and prepare uniform perovskite films with a continuous distribution of OBS at grain boundaries. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are conducted to reveal the interactions of
hydrogen bonding and coordination bonding between OBS and perovskite. Various characterizations (including
X-ray diffraction, UV-vis spectroscopy, electrochemical impedance spectroscopy, etc.) are conducted to uncover
the effect of OBS on device performance. Consequently, high efficiency of 23.26% is obtained for the OBS-treated
device, while the control device shows only a companion efficiency of 21.60%.
KW  - Perovskite solar cells; organic small molecule; grain boundary; hydrogen bonding; coordination bonding

DO  - 10.32604/jrm.2022.023122