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Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

Authors :
Andrew T. Smith
Mingtao Zheng
Yuqiong Sun
Guangqi Hu
Shuting Liu
Songshan Zeng
Shuangshuang Wu
Yingliang Liu
Weixing Wang
Luyi Sun
Xiaoliang Pang
Chaofan Hu
Source :
Nature Communications, Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020)
Publication Year :
2020

Abstract

Room temperature phosphorescence materials have inspired extensive attention owing to their great potential in optical applications. However, it is hard to achieve a room temperature phosphorescence material with simultaneous long lifetime and high phosphorescence quantum efficiency. Herein, multi-confined carbon dots were designed and fabricated, enabling room temperature phosphorescence material with simultaneous ultralong lifetime, high phosphorescence quantum efficiency, and excellent stability. The multi-confinement by a highly rigid network, stable covalent bonding, and 3D spatial restriction efficiently rigidified the triplet excited states of carbon dots from non-radiative deactivation. The as-designed multi-confined carbon dots exhibit ultralong lifetime of 5.72 s, phosphorescence quantum efficiency of 26.36%, and exceptional stability against strong oxidants, acids and bases, as well as polar solvents. This work provides design principles and a universal strategy to construct metal-free room temperature phosphorescence materials with ultralong lifetime, high phosphorescence quantum efficiency, and high stability for promising applications, especially under harsh conditions.<br />For room temperature phosphorescence (RTP) materials to reach their potential for optical applications, new materials with improved performance must be realized. Here, the authors report multi-confined carbon dots as high stability RTP materials with long afterglow lifetime & high efficiency.

Details

ISSN :
20411723
Volume :
11
Issue :
1
Database :
OpenAIRE
Journal :
Nature communications
Accession number :
edsair.doi.dedup.....ad853dae4228492f0f43c75642ca9e5c