Near-Infrared-Excited Multicolor Afterglow in Carbon Dots-Based Room-Temperature Afterglow Materials,Angewandte Chemie International Edition

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Near-Infrared-Excited Multicolor Afterglow in Carbon Dots-Based Room-Temperature Afterglow Materials
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2021-08-13 , DOI: 10.1002/anie.202108696
Yihao Zheng ₁ , Haopeng Wei ₁ , Ping Liang ₁ , Xiaokai Xu ₁ , Xingcai Zhang ₂ , Huihong Li ₁ , Chenlu Zhang ₁ , Chaofan Hu ₁ , Xuejie Zhang ₁ , Bingfu Lei ₁ , Wai-Yeung Wong ₃ , Yingliang Liu ₁ , Jianle Zhuang ₄

Affiliation

Room-temperature afterglow (RTA) materials with long lifetime have shown tremendous application prospects in many fields. However, there is no general design strategy to construct near-infrared (NIR)-excited multicolor RTA materials. Herein, we report a universal approach based on the efficient radiative energy transfer that supports the reabsorption from upconversion materials (UMs) to carbon dots-based RTA materials (CDAMs). Thus, the afterglow emission (blue, cyan, green, and orange) of various CDAMs can be activated by UMs under the NIR continuous-wave laser excitation. The efficient radiative energy transfer ensured the persistent multicolor afterglow up to 7 s, 6 s, 5 s, and 0.5 s by naked eyes, respectively. Given the unusual afterglow properties, we demonstrated preliminary applications in fingerprint recognition and information security. This work provides a new avenue for the activation of NIR-excited afterglow in CDAMs and will greatly expand the applications of RTA materials.

中文翻译：

基于碳点的室温余辉材料中的近红外激发多色余辉

具有长寿命的室温余辉（RTA）材料在许多领域显示出巨大的应用前景。然而，没有通用的设计策略来构建近红外 (NIR) 激发的多色 RTA 材料。在此，我们报告了一种基于有效辐射能量转移的通用方法，该方法支持从上转换材料 (UM) 到基于碳点的 RTA 材料 (CDAM) 的重吸收。因此，在近红外连续波激光激发下，UMs 可以激活各种 CDAM 的余辉发射（蓝色、青色、绿色和橙色）。有效的辐射能量转移确保了肉眼分别长达7 s、6 s、5 s和0.5 s的持续多色余辉。鉴于不寻常的余辉特性，我们展示了在指纹识别和信息安全方面的初步应用。

更新日期：2021-09-27

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