Controlled Growth of Hybrid Halide Perovskites by Crown Ether Complexation for Perovskite Solar Cells
Jong-Min Kim a, Ji-Youn Seo a, Sun-Ju Kim a
a Laboratory of Nano Energy Harvesting Materials and Devices, Department of Nano Engineering, Pusan National University, Pusan, Korea
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Tokyo, Japan, 2024 January 21st - 23rd
Organizers: Qing Shen and James Ryan
Poster, Jong-Min Kim, 097
Publication date: 18th October 2023

 A lot of methods are being used to enhance power conversion efficiency(PCE) of perovsktie solar cells(PSC), and one of the method is additive engineering. Additive engineering can improve perovskite film crystallization and reduce defect density. In organic-inorganic hybrid solar cells, crown ether molecules have been utilized to passivate perovskite defect at interfaces or grain boundaries. However, this strategy has been underexploited in perovskite photovoltaics, and the underlying mechanisms are not well understood. Herein, we studied influence of crown ether derivatives, 15C5(15-crown-5), B15C5(Benzo-15-crown-5, 2A-15C5((15-crown-5)-2-methylamine), 4A-B15C5(4’-aminobenzo-15-crown-5 on perovskite crystal growth and solar cell device performance. We demonstrate the propensity of crown ether modulators to interact with Pb2+ cations at the perovskite interface by density functional theory calculations. This has been shown to facilitate oriented crystal growth and homogeneous film formation, as revealed by X-ray diffraction analysis complemented by scanning electron microscopy. As a result, we found that crown ether derivatives controlled perovskite crystal growth by interacting with Pb2+, and consequently we succeed to improve PCE. 



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