封装(网络)
材料科学
机械容积
荧光粉
兴奋剂
聚合物
化学工程
光电子学
复合材料
计算机科学
计算机安全
工程类
作者
Xiaohan Wu,Mengmeng Cao,Congcong Han,Jinyi Zhang,Xiangrong Li,Jieqiong Wan
出处
期刊:Polymers
[Multidisciplinary Digital Publishing Institute]
日期:2024-08-23
卷期号:16 (17): 2389-2389
标识
DOI:10.3390/polym16172389
摘要
Rare earth and transition metal ion-doped CaZnOS has garnered significant attention for its exceptional mechanoluminescence (ML) performance under mild mechanical stimuli and its capability for multicolor emissions. Since powdered phosphors are not directly usable, they require encapsulation within with polymers to create stable structures. This study investigates Mn2+-doped CaZnOS (CaZnOS:Mn2+) as the ML phosphor, optimizing its performance by varying the Mn2+ content, resulting in bright orange-red emissions from the d-d transitions of the Mn2+ activator. A quantum efficiency of 59.08% was achieved through the self-sensitization of the matrix lattice and energy transfer to the Mn2+ luminescent centers. The enhancement in ML due to Mn2+ doping is attributed to the reduced trap depth and increased trap concentration. Encapsulation with four polymers—PDMS, PU, SIL, and RTV-2—was explored to further optimize ML performance. Among these, PDMS provides the best ML output and sensitivity, owing to its slightly cross-linked structure and good triboelectric properties. The optimized CaZnOS:0.03Mn2+/PDMS composite, featuring excellent flexibility and recoverability, shows great potential for applications in anti-counterfeiting encryption, stress sensors, and wearable devices.
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