Improved Crystallization of Perovskite Films by Optimized Solvent Annealing for High Efficiency Solar Cell.
Organic-inorganic halide perovskite-based thin film solar cells show excellent light-to-power conversion efficiency. The high performance for the devices requires the preparation of well-crystallized perovskite absorbers. In this paper, we used the postannealing process to treat the perovskite films under different solvent vapors and observed that the solvent vapors have a strong effect on the film growth. A model regarding the perovskite film growth was proposed as well. Intensive characterizations including scanning electron microscopy, electrochemical impedance spectroscopy, and admittance spectroscopy allowed us to attribute the improved performance to reduced recombination loss and defect density. Solar cell based on the DMSO-treated films delivered a power conversion efficiency of over 13% with negligible photocurrent hysteresis.
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Jiang
J
Liu
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.|School of Optoelectronic Information, University of Electronic Science and Technology , Chengdu 610054, China.
Cheng
C
Gao
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Xulin
X
He
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Qinyan
Q
Ye
School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China.
Liangqi
L
Ouyang
School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China.
Daming
D
Zhuang
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Cheng
C
Liao
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Jun
J
Mei
Chengdu Green Energy and Green Manufacturing Technology R&D Centre, Chengdu Development Center of Science and Technology, China Academy of Engineering Physics , Chengdu 610207, China.
Woonming
W
Lau
PCBM; crystallization; film growth; organic lead iodide; solar cell; solvent annealing