International Journal Publication
Reducing defects in organic-lead halide perovskite film by delayed thermal annealing combined with KI/I2 for efficient perovskite solar cells
Author affiliations and roles
- a1 Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; shunhsiangchan@gmail.com (S.-H.C.); jun864@naver.com (S.A.); kero5206@gmail.com (C.-C.T.); cgu.yinhsuanchang@gmail.com (Y.-H.C.)
- b2 Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan
- c3 Green Technology Research Center, Chang Gung University, Taoyuan 33302, Taiwan; weihoa.chiu@gmail.com
- d4 Center for Reliability Sciences and Technologies, Chang Gung University, Taoyuan 33302, Taiwan
- eChang Gung University of Science and Technology
- f5 Electroorganic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, India; vidhyasur@yahoo.co.in
- g6 Department of Chemical and Materials Engineering, National Central University, Jhongli District, Taoyuan 32001, Taiwan
Nanomaterials, 11, 1607 (2021).
Research topic: Perovskite Solar Cells
Abstract
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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