期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 21, 页码 6796-6801出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc01001h
关键词
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资金
- National Natural Science Foundation of China [62005106, 52002152]
- Natural Science Foundation of Jiangsu [BK20190865, BK20190864]
- China Postdoctoral Science Foundation [2019M651726]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [19KJB430014]
- Jiangsu Provincial Program for High-Level Innovative and Entrepreneurial Talents Introduction and the High-Tech Research Key Laboratory of Zhenjiang [SS2018002]
The CD@BA powders prepared by heat treatment exhibit highly efficient white-light emissions with a total quantum yield of 46% and a phosphorescence QY of 30%, along with an emission spectrum width over 180nm. Doping of N and B atoms and the strong interaction between CDs and the BA matrix effectively prevent aggregation-induced quenching and greatly promote phosphorescence emission.
White-light-emitting carbon dots (CDs) with fluorescence/phosphorescence dual-emission features are of great importance for single-phase white-light-emitting diodes (WLEDs), but so far rather limited due to weak phosphorescence. Herein, a highly efficient white-light emissive CD-based material is developed by one-step heat treatment of lycorine hydrochloride and boric acid (BA). The prepared CD@BA powders show prominent fluorescence/phosphorescence dual-emission with extraordinarily high overall quantum yield (QY) of 46%, phosphorescence QY of 30% and a broad full width at half maximum over 180 nm. Doping of N and B atoms as well as the strong interaction between CDs and the BA matrix not only effectively prevents aggregation-induced quenching in the solid state, but also greatly promotes phosphorescence emission, leading to the emergence of an ultrabroad-band emission spectrum. Based on the unique dual-emissive performance of CD@BA powders, they are successfully applied to single-component WLEDs. This work provides a new strategy for mass production of efficient white-light emissive CD-based materials, which have promising applications for single-phase WLEDs.
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