Multicolor Carbon Dots Prepared by Single-Factor Control of Graphitization and Surface Oxidation for High-Quality White Light-Emitting Diodes

被引：133

作者：

Zheng, Yuxin ^{[1
]}

Arkin, Kamile ^{[1
]}

Hao, Jiawei ^{[1
]}

Zhang, Siyi ^{[1
]}

Guan, Wei ^{[1
]}

Wang, Lingling ^{[1
]}

Guo, Yingna ^{[1
]}

Shang, Qingkun ^{[1
]}

机构：

[1] Northeast Normal Univ, Fac Chem, Changchun 130024, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2021年 / 9卷 / 19期

基金：

中国国家自然科学基金;

关键词：

asparagine and p-phenylenediamine; luminescence mechanism; multicolor carbon dots; single-factor control; white LEDs; QUANTUM DOTS; EMISSION; LUMINESCENCE; ENERGY; GREEN; RED;

D O I：

10.1002/adom.202100688

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In a reaction system of asparagine and p-phenylenediamine, blue, green, orange, and red carbon dots (CDs) are successfully prepared by adjusting the ratio of the two reactants. The obtained multicolor CDs have excellent stable properties and high fluorescence quantum yields (up to 74%). Clarifying the luminescence mechanism of multicolor CDs is based on the investigation of the composition, structure, and fluorescence properties of the CDs combined with quantum chemistry calculations. A high-quality white light-emitting diode (LED) with CIE color coordinates (0.33, 0.33) is successfully fabricated using a multicolor CD-epoxy resin composite, and its color temperature and color rendering index are 5612 K and 94, respectively. It is of great significance to prepare multicolor CDs with high fluorescence quantum yields by single-factor control. Using multicolor CDs to fabricate standard white LEDs close to sunlight will significantly increase the practical application value of CDs.

引用

页数：11

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