期刊
NANOMATERIALS
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/nano11061607
关键词
perovskite solar cell; delayed annealing process; defect; additives
类别
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2628-E182-003-MY3]
- Chang Gung University [QZRPD181]
- Chang Gung Memorial Hospital, Linkou [CMRPD2J0041]
This study improved the quality of CH3NH3PbI3 (MAPbI(3)) perovskite films by delaying thermal annealing and introducing KI and I-2 additives. The optimal delayed thermal annealing time was found to be 60 minutes, while the addition of KI/I-2 can enhance the photoelectric conversion efficiency of solar cells. Under optimized conditions, the efficiency of MAPbI(3) perovskite solar cells can reach 19.36%.
This study improved quality of CH3NH3PbI3 (MAPbI(3)) perovskite films by delaying thermal annealing in the spin coating process and introducing KI and I-2 to prepare MAPbI(3) films that were low in defects for high-efficiency perovskite solar cells. The influences of delayed thermal annealing time after coating the MAPbI(3) perovskite layer on the crystallized perovskite, the morphology control of MAPbI(3) films, and the photoelectric conversion efficiency of solar cells were investigated. The optimal delayed thermal annealing time was found to be 60 min at room temperature. The effect of KI/I-2 additives on the growth of MAPbI(3) films and the corresponding optimal delayed thermal annealing time were further investigated. The addition of KI/I-2 can improve perovskite crystallinity, and the conductivity and carrier mobility of MAPbI(3) films. Under optimized conditions, the photoelectric conversion efficiency of MAPbI(3) perovskite solar cells can reach 19.36% under standard AM1.5G solar illumination of 100 mW/cm(2).
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