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- W3154344063 abstract "The inevitable defects on the surface of the perovskite layer seriously reduce the efficiency and stability of perovskite solar cells. In this work, thymine, one of the four nucleobases in DNA, is developed as a multifunctional modification agent to passivate the uncoordinated Pb2+ on the perovskite film surface via post-treatment. Spectral data confirm that the surface defects of the perovskite film are effectively passivated via a strong interaction between the Pb ion and carbonyl group. Photoluminescence spectral and electrochemical impedance spectral results demonstrate that the defect-induced recombination of charge carriers at the interface is suppressed. The thymine-modified planar perovskite solar cells exhibit better charge collection, and the fill factor and power conversion efficiency are increased. Moreover, the hydrophobic nature of thymine also significantly improves the humidity stability of the solar cells. The unencapsulated passivated solar cells maintain 68% of the initial efficiency after 1000 h of exposure in the air with a relative humidity of 50 ± 5%. This work provides an effective and eco-friendly surface modification agent for improving the performance of perovskite solar cells." @default.
- W3154344063 created "2021-04-26" @default.
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- W3154344063 date "2021-04-12" @default.
- W3154344063 modified "2023-10-09" @default.
- W3154344063 title "Thymine as a Biocompatible Surface Passivator for a Highly Efficient and Stable Planar Perovskite Solar Cell" @default.
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- W3154344063 doi "https://doi.org/10.1021/acsaem.0c03068" @default.
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