https://scholars.lib.ntu.edu.tw/handle/123456789/630218
標題: | Terpyridine-zinc(ii) coordination nanosheets as modulators of perovskite crystallization to enhance solar cell efficiency | 作者: | Wang, Ying Chiao Chiang, Chun Hao Su, Chun Jen Chang, Je Wei Lin, Chi Ying Wei, Chia Chun Huang, Shao Ku Maeda, Hiroaki Jian, Wen Bin Jeng, U. Ser Tsukagoshi, Kazuhito CHUN-WEI CHEN Nishihara, Hiroshi |
關鍵字: | COMPLEXES; GROWTH | 公開日期: | 1-一月-2023 | 出版社: | ROYAL SOC CHEMISTRY | 卷: | 11 | 期: | 13 | 起(迄)頁: | 7077 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | The high efficiency of precursor-to-perovskite conversion is one of the core factors in boosting the performance of perovskite solar cells (PSCs). Herein, we report a liquid/liquid interfacial synthesis of terpyridine-zinc(ii) (ZnTPY) coordination nanosheets (CONASHs), which can enhance PbI2-based perovskite crystallization and thus the efficiency of PSCs. Ultrasonically fragmented ZnTPY CONASHs, rich in uncoordinated terpyridine moieties, caused multidentate chelation with PbI2, resulting in a well-dispersed ZnTPY:PbI2 complex. This metal-organic complex could act as a heterogeneous nucleation seed and facilitate the formation of a PbI2-to-[PbI6−x]4− coordinated octahedral framework in a precursor solution of perovskite, thereby reducing the crystallization barrier of tetragonal CH3NH3PbI3 perovskites and achieving a complete precursor-to-perovskite conversion. Consequently, ZnTPY-capped perovskite crystals had a long photoluminescence (PL) lifetime, which is attributed to the more passivated trap states associated with ZnTPY. The corresponding PSCs exhibited an optimal power conversion efficiency of 19.8% compared with 17.9% of the controlled device. The results prove that the performance of PSC families can be improved by dispersing PbI2 in a solution with CONASHs for enhancing the PbI2-to-perovskite conversion. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630218 | ISSN: | 20507488 | DOI: | 10.1039/d3ta00505d |
顯示於: | 材料科學與工程學系 |
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