A dual-emitting core-shell carbon dot-silica-phosphor composite for white light emission

被引：37

作者：

Chen, Yonghao ^{[1
]}

Lei, Bingfu ^{[1
]}

Zheng, Mingtao ^{[1
]}

Zhang, Haoran ^{[1
]}

Zhuang, Jianle ^{[1
]}

Liu, Yingliang ^{[1
]}

机构：

[1] South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China

来源：

NANOSCALE | 2015年 / 7卷 / 47期

基金：

中国国家自然科学基金;

关键词：

FACILE ACCESS; OPTIMIZATION; LUMINESCENT;

D O I：

10.1039/c5nr05637c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A unique dual-emitting core-shell carbon dot-silica-phosphor (CDSP) was constructed from carbon dots (CDs), tetraethoxysilane (TEOS) and Sr2Si5N8:Eu2+ phosphor through a one-pot sol-gel method. Blue emitting CDs uniformly disperse in the silica layer covering the orange emitting phosphor via a polymerization process, which makes CDSP achieve even white light emission. Tunable photoluminescence of CDSP is observed and the preferable white light emission is achieved through changing the excitation wavelength or controlling the mass ratio of the phosphor. When CDSP powders with a phosphor rate of 3.9% and 5.1% are excited at a wavelength of 400 nm, preferable white light emission is observed, with Commission Internationale de l'Eclairage (CIE) coordinates of (0.32, 0.32) and (0.34, 0.32), respectively. Furthermore, CDSP can mix well with epoxy resin to emit strong and even white light, and based on this, a CDSP-based white LED with a high colour rendering index (CRI) of 94 was fabricated.

引用

页码：20142 / 20148

页数：7

共 23 条

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