1. CsPbBr3 perovskite quantum dots-based Janus membrane with multifunction of luminescence, magnetism and aeolotropic electroconductivity.
- Author
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Huo, Xintong, Xie, Yunrui, Sheng, Yuqi, Shao, Hong, Hu, Yaolin, Yang, Liu, Qi, Haina, Ma, Qianli, Yu, Wensheng, and Dong, Xiangting
- Subjects
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MAGNETISM , *LUMINESCENCE , *QUANTUM dots , *PEROVSKITE , *PHOTOELECTRIC devices , *MICROFIBERS - Abstract
[Display omitted] • Janus membrane based on CsPbBr 3 QDs is first prepared via a parallel electrospinning. • CsPbBr 3 QDs as fluorescent emitter are first used to build multifunctional membrane. • Janus microfiber as building element ensures strong luminescence of CsPbBr 3 QDs. • The membrane can stabilize CsPbBr 3 QDs to achieve intense and steady fluorescence. • Membrane has green fluorescence and tunable magnetism and aeolotropic conductivity. 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 3 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 3 /polymethyl methacrylate (PMMA)]//[CoFe 2 O 4 /PMMA] Janus microfibers as building elements. The down-layer of JMAJM is luminescence/electroconductivity Janus microfibers array (L/E-JMAJM) fabricated by [CsPbBr 3 /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 3 QDs. This peculiar Janus microfiber enables the effective separation and high integration of CsPbBr 3 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 3 QDs while simultaneously endows perovskite QDs-based materials with additional functions to realize multifunction. Under ultraviolet excitation, fluorescence characteristics of the CsPbBr 3 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−1, high conductance of 10-2 S and aeolotropic electroconductivity degree of 107. 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. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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