Huo Xintong, Xie Yunrui, Sheng Yuqi, Shao Hong, Hu Yaolin, Yang Liu, Qi Haina, Ma Qianli, Yu Wensheng, Dong Xiangting
College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China.
Chongqing Research Institute, Changchun University of Science and Technology, Chongqing 401135, China; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
J Colloid Interface Sci. 2024 Jul 15;666:615-628. doi: 10.1016/j.jcis.2024.04.048. Epub 2024 Apr 9.
Lead halide perovskite quantum dots (QDs) are promising semiconductors for next-generation photoelectric devices. However, the development of perovskite QDs-based multifunctional materials still needs to be addressed in order to further advance the application of perovskite QDs. Herein, a successful synthesis of Janus microfibers array Janus membrane (JMAJM) with up-down structure and multifunction of luminescence, magnetism and electroconductivity is firstly achieved based on CsPbBr QDs through a parallel electrospinning. JMAJM comprises up-down two layers tightly bonded together. The up-layer of JMAJM is luminescence/magnetism Janus microfibers array (L/M-JMAJM) constructed by [CsPbBr/polymethyl methacrylate (PMMA)]//[CoFeO/PMMA] Janus microfibers as building elements. The down-layer of JMAJM is luminescence/electroconductivity Janus microfibers array (L/E-JMAJM) fabricated by [CsPbBr/PMMA]//[polyaniline (PANI)/PMMA] Janus microfibers as building elements. Two independent microcosmic regions are designed and realized in a Janus microfiber, confining luminescence with magnetic or conductive substances into their respective regions, thus minimizing adverse effects of other dark-colored functional substances on the fluorescence of CsPbBr QDs. This peculiar Janus microfiber enables the effective separation and high integration of CsPbBr QDs with other functional substances. The up-down structure of JMAJM ensures a high integration of luminescence, magnetism and conductivity. Meanwhile, JMAJM addresses the environmental instability of CsPbBr QDs while simultaneously endows perovskite QDs-based materials with additional functions to realize multifunction. Under ultraviolet excitation, fluorescence characteristics of the CsPbBr QDs in JMAJM are maintained, exhibiting a vibrant green emission at 517 nm. Meanwhile, JMAJM achieves a maximum saturation magnetization of 20.32 emu·g, high conductance of 10 S and aeolotropic electroconductivity degree of 10. The combination of micro-partition with macro-partition in JMAJM receives superior concurrent luminescence-magnetic-conductive multifunction. This work provides a novel idea and strategy for advancing perovskite QDs-based multifunctional materials.
卤化铅钙钛矿量子点（QDs）是用于下一代光电器件的有前途的半导体。然而，为了进一步推进钙钛矿量子点的应用，基于钙钛矿量子点的多功能材料的开发仍有待解决。在此，首先通过平行静电纺丝基于CsPbBr量子点成功合成了具有上下结构以及发光、磁性和导电性多功能的双面微纤维阵列双面膜（JMAJM）。JMAJM由紧密结合在一起的上下两层组成。JMAJM的上层是由[CsPbBr/聚甲基丙烯酸甲酯（PMMA）]//[CoFeO/PMMA]双面微纤维作为构建元素构建的发光/磁性双面微纤维阵列（L/M-JMAJM）。JMAJM的下层是由[CsPbBr/PMMA]//[聚苯胺（PANI）/PMMA]双面微纤维作为构建元素制造的发光/导电双面微纤维阵列（L/E-JMAJM）。在一个双面微纤维中设计并实现了两个独立的微观区域，将发光与磁性或导电物质限制在各自区域内，从而最大限度地减少其他深色功能物质对CsPbBr量子点荧光的不利影响。这种特殊的双面微纤维能够实现CsPbBr量子点与其他功能物质的有效分离和高度集成。JMAJM的上下结构确保了发光、磁性和导电性的高度集成。同时，JMAJM解决了CsPbBr量子点的环境不稳定性问题，同时赋予基于钙钛矿量子点的材料额外功能以实现多功能。在紫外激发下，JMAJM中CsPbBr量子点的荧光特性得以保持，在517nm处呈现出鲜艳的绿色发射。同时，JMAJM实现了20.32emu·g的最大饱和磁化强度、10S的高电导率和10的各向异性电导率。JMAJM中微观分区与宏观分区的结合获得了优异的并发发光-磁性-导电多功能。这项工作为推进基于钙钛矿量子点的多功能材料提供了新的思路和策略。
