光致变色
纳米晶
剂量计
材料科学
紫外线
钙钛矿(结构)
纳米材料
纳米技术
荧光
辐照
光化学
辐射
光电子学
光学
化学
有机化学
物理
核物理学
作者
Jie Chen,Ruifen Sun,Jingcheng Zheng,Weiwei Zhang,Yun Huang,Jiwei Shao,Yuwu Chi
出处
期刊:Small
[Wiley]
日期:2024-02-16
被引量:3
标识
DOI:10.1002/smll.202311993
摘要
Abstract Excessive ultraviolet (UV) radiation has serious damage to human's health, therefore the development of visible, portable, and wearable sensor for monitoring UV radiation, especially the cumulative UV dosage, is highly desired but full of challenges. Herein, a wearable and flexible UV dosimeter based on photochromic perovskite nanocrystals (PNCs) is designed. The obtained CsPbCl 3 PNCs dispersed in dibromomethane (PNCs‐DBM) undergo continuous, vivid, and multiple (from very weak purple to blue, cyan, and finally strong green) color change in response to UV radiation. It is demonstrated that the UV‐induced degradation of DBM and subsequent anion‐exchange reaction between CsPbCl 3 and Br − , play a crucial role in the color change of PNCs‐DBM. The properties of continuous fluorescence color change and enhanced fluorescence intensity enable the construction of sensitive and visible UV dosimeter. Furthermore, by integrated photochromic PNCs with flexible bracelet or PDMS substrate, a wearable UV sensor or a multi‐indicator array for the detection of solar UV dosage is developed. This work may advance the fundamental understanding about photochromic perovskite, and show promising application of perovskite nanomaterials in easily fabricated, low‐cost, visualized, and wearable solar UV dosimeter.
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