Controlled Growth of Hybrid Halide Perovskites by Crown Ether Complexation for Perovskite Solar Cells
발표자
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초록
내용
Host-guest complexation has demonstrated potential for controlling hybrid organic-inorganic metal halide perovskite materials. In particular, crown ethers have been used due to their capacity to interact with metal cations(e.g.,Pb2+) and small organic cations(e.g., methyl ammonium(MA)),which can affect hybrid perovskite materials and their solar cells. In this study, we investigate the influence of 15-crown-5 (15C5) and its benzannulated derivative(benzo-15-crown5,B15C5), as well as amino-functionalized analogues (15-crown-5)-2-methylamine, 2A-15C5, and 4’-aminobenzo-15-crown-5, 4A-B15C5, on MAPbI3 perovskite crystallization and inverted solar cell performance. We demonstrate the propensity of crown ether modulators to interact with Pb2+ cations at the perovskite interface by density functional theory calculations. As a result, we demonstrate an increase in the power conversion efficiency of the solar cells of interest to advancing hybrid photovoltaics.