Facile synthesis strategy for cesium tin halide perovskite crystals toward light emitting devices and anti-counterfeiting flexible fiber. Issue 10 (13th February 2023)

• Record Type: Journal Article
• Authors: Hu, Ziyao; Nie, Kun; Wang, Xuyi; Duan, Xiuqiang; Zhou, Ranran; Wu, Mengyun; Ma, Xiaoxue; Zhang, Xiaodong; Wang, Luoxin; Mei, Lefu; Wang, Hua
• Is Part Of: Nanoscale. Volume 15:Issue 10(2023)
• Page Start: 4893
• Page End: 4898
• Publication Date: 2023-02-13
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d3nr00301a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Cs2 Sn1− x Te x Cl6 crystals are synthesized and can be used for post-processing fibers for LED and anti-counterfeiting materials. Abstract : All-inorganic metal halide perovskites are widely studied because of their excellent photoelectric properties. However, due to the toxicity of CsPbX3 (X = Cl, Br, I) perovskites, it is difficult to apply them on a large scale. The lead-free nature and air stability make Cs2 SnX6 (X = Cl, Br, I) perovskites possible candidates to replace CsPbX3 perovskites. Herein, we report the perovskite crystals (PCs) based on Te(iv )-doped Cs2 SnCl6 : Cs2 Sn1− x Te x Cl6 . Cs2 Sn1− x Te x Cl6 PCs showed yellow emission under a 365 nm ultraviolet lamp. The photoluminescence quantum yield (PLQY) of Cs2 Sn0.94 Te0.06 Cl6 PCs was 57.09%, which was proposed to be from the triplet Te(iv ) ion 3 P1 → 1 S0 self-trapping excitons (STE) recombination. The perovskite crystals can be used to fabricate light-emitting diodes (LEDs). The fiber paper prepared from aramid chopped fibers (ACFs) and polyphenylene sulfide (PPS) fibers showed a bright yellow light under 365 nm ultraviolet light after being post-processed with Cs2 Sn1− x Te x Cl6 PCs solution. The ACFs/PPS compound fiber paper modified with Cs2 Sn1− x Te x Cl6 PCs maintained exceptional optical properties and could be stored in air for more than 4500 h. The fluorescence performance of the modified ACFs/PPS compound fiber paper could be applied to fluorescence anti-counterfeiting. The modification strategy and the applications in this work will provide a good choice for studying the optical performance of perovskites and broaden the application of ACFs/PPS compound fiber paper.