Issue 58, 2019

A simple and green synthesis of carbon quantum dots from coke for white light-emitting devices

Abstract

Coke is a by-product of coal. This paper reports a simple and green chemical oxidation method for carbon quantum dots (CQDs) from coke for use in novel applications. The CQDs emit blue fluorescence and have a fluorescence quantum yield of 9.2% and blue-green-red spectral composition of 48%. A light-emitting diode (LED) was fabricated by combining the CQDs as a white-light converter with an ultraviolet chip. The Commission Internationale de L'Eclairage chromaticity coordinate (0.31, 0.35) and correlated color temperature (5125 K) of the LED are located in a cool white light zone, suggesting that they have superior potential application in lighting devices.

Graphical abstract: A simple and green synthesis of carbon quantum dots from coke for white light-emitting devices

Article information

Article type
Paper
Submitted
01 Sep 2019
Accepted
15 Oct 2019
First published
21 Oct 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 33789-33793

A simple and green synthesis of carbon quantum dots from coke for white light-emitting devices

X. Feng and Y. Zhang, RSC Adv., 2019, 9, 33789 DOI: 10.1039/C9RA06946A

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