期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 259, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.124032
关键词
MAPbI(3-x)Cl(x) perovskite; Mixed-lead halide; Room-temperature air-quenching; Solar cells
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2221-E-009-139, MOST 109-2221-E-009-166]
The study focuses on the utilization of mixed-lead halide precursors to improve hysteresis in room-temperature air-quenching perovskite solar cells, resulting in a low hysteresis effect index of -0.032. Smooth film morphology and low trap density contributed by the mixed-lead halide precursor were identified as key factors in overcoming hysteresis in the PSCs.
This work highlights the utilization of mixed-lead halide precursor for improvement of hysteresis in room-temperature air-quenching perovskite solar cells (PSCs). Room-temperature air-quenching method has been proved as an effective way to improve the morphology of perovskite thin films as well as the efficiency of the PSCs. However, the high hysteresis of the room-temperature air-quenching PSCs is still an obstacle to be overcome. By using mixed-lead halide precursor, the room-temperature air-quenching PSCs exhibited a low hysteresis effect index (HEI) of -0.032. The results of X-ray diffractometry (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), photoluminescence (PL), space charge limited current measurement (SCLC), and capacitance-voltage (C-V) measurement suggested that the improvement of the hysteresis of the room-temperature air-quenching PSCs can be ascribed to smooth film morphology and the low trap density contributed by the mix-lead halide precursor.
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