https://scholars.lib.ntu.edu.tw/handle/123456789/627012
標題: | Harnessing of Spatially Confined Perovskite Nanocrystals Using Polysaccharide-based Block Copolymer Systems | 作者: | Hung, Chih-Chien Lin, Yan-Cheng Chuang, Tsung-Han Chiang, Yun-Chi Chiu, Yu-Cheng Mumtaz, Muhammad Borsali, Redouane WEN-CHANG CHEN |
關鍵字: | perovskite; photonic memory; polysaccharide block copolymers; self-assembly; stretchable | 公開日期: | 6-七月-2022 | 出版社: | AMER CHEMICAL SOC | 卷: | 14 | 期: | 26 | 來源出版物: | ACS applied materials & interfaces | 摘要: | Metal halide perovskite nanocrystals (PVSK NCs) are generally unstable upon their transfer from colloidal dispersions to thin film devices. This has been a major obstacle limiting their widespread application. In this study, we proposed a new approach to maintain their exceptional optoelectronic properties during this transfer by dispersing brightly emitting cesium lead halide PVSK NCs in polysaccharide-based maltoheptaose-block-polyisoprene-block-maltoheptaose (MH-b-PI-b-MH) triblock copolymer (BCP) matrices. Instantaneous crystallization of ion precursors with favorable coordination to the sugar (maltoheptaose) domains produced ordered NCs with varied nanostructures of controlled domain size (≈10-20 nm). Confining highly ordered and low dimension PVSK NCs in polysaccharide-based BCPs constituted a powerful tool to control the self-assembly of BCPs and PVSK NCs into predictable structures. Consequently, the hybrid thin films exhibited excellent durability to humidity and stretchability with a relatively high PL intensity and photoluminescence quantum yield (>70%). Furthermore, stretchable phototransistor memory devices were produced and maintained with a good memory ratio of 105 and exhibited a long-term memory retention over 104 s at a high strain of 100%. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/627012 | ISSN: | 1944-8244 | DOI: | 10.1021/acsami.2c09296 |
顯示於: | 化學工程學系 |
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