Open AccessEnhanced hole extraction in green energy perovskite solar cell by CuOx/spiro-OMeTAD bilayer with improved performance
Author(s) -
Li Xiao,
Guanxiong Wang,
Jianxi Yao
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/804/3/032062
Subject(s) - bilayer , perovskite (structure) , perovskite solar cell , materials science , solar cell , hysteresis , energy conversion efficiency , layer (electronics) , optoelectronics , extraction (chemistry) , nanotechnology , crystallography , chemistry , condensed matter physics , physics , biochemistry , chromatography , membrane
Hole transport layer is of vital important for improving the photo-to-electron efficiency of perovskite solar cells. In this study, we investigate the performance of meso-structure perovskite solar cell applying bilayer materials for improving hole extraction ability. By simulating the performance of perovskite solar cell using wxAMPS software, CuO x is chosen to be ideal candidate of inorganic hole transport material which can moderate device property. The optimized value band offset in schematic diagram shows that photo-generated holes could be extracted from perovskite layer to spiro-OMeTAD efficiently by applying CuO x layer at the interface of perovskite/spiro-OMeTAD. Moreover, the experiment results show that Jsc of device increase to 19.5 mA/cm 2 , FF increase to 65.9% and total PCE reaches 12.3% by adopting CuO x /spiro-OMeTAD bilayer as hole transfer layer. Simultaneously, hysteresis decreases from 2% to 0.7% and integrated Jsc increase from 14.8 mA/cm 2 to 16.03 mA/cm 2 . The PL results also confirm the mechanism of carrier extraction, which is consist with experimental results. It suggests that applying CuO x /spiro-OMeTAD bilayer is an efficient way to improve performance of perovskite solar cell.