The application of Zn0.8Cd0.2S nanocrystals in white light emitting diodes devices

Ya-Ching Chen; Cyuan-Bin Siao; Hong-Shuo Chen; Kuan-Wen Wang; Shu-Ru Chung

doi:10.1039/C5RA15068J

The application of Zn_0.8Cd_0.2S nanocrystals in white light emitting diodes devices†

Ya-Ching Chen,^a Cyuan-Bin Siao,^ab Hong-Shuo Chen,^a Kuan-Wen Wang*^a and Shu-Ru Chung*^b

* Corresponding authors

^a Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan
E-mail: kuanwen.wang@gmail.com
Fax: +886-3-2805034
Tel: +886-3-4227151 ext. 34906

^b Department of Materials Science and Engineering, National Formosa University, Yunlin 63201, Taiwan
E-mail: srchung@nfu.edu.tw
Fax: +886-5-6361981
Tel: +886-5-6315483

Abstract

In this study, colloidal ternary semiconductor Zn_0.8Cd_0.2S (ZnCdS) nanocrystals (NCs) with wide emission and high quantum yields (QYs) have been prepared and used as nanophosphors in white light emitting diodes (WLEDs). The optical properties of ZnCdS NCs-based WLEDs including Commission Internationale de l'Eclairage (CIE) chromaticity coordinates, correlated color temperature (CCT), color rendering index (CRI) and luminous efficiency can be adjusted by the various ZnCdS NCs, using different carbon chain lengths of alkenes as surface ligands, reaction time, NCs contents and encapsulation methods. The optimal conditions of CIE, CRI, CCT and luminous efficiency, and decay during stability test for ZnCdS NCs-based WLEDs are (0.32, 0.30), 82, 6811 K, 4.26 lm W⁻¹, and 0.036 lm W⁻¹ h⁻¹, respectively by the UV chip with only one type of ZnCdS NCs layer. The results have exhibited the potential application of ZnCdS NCs as nanophosphors in WLEDs.

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Article information

DOI: https://doi.org/10.1039/C5RA15068J
Article type: Communication
Submitted: 29 Jul 2015
Accepted: 12 Oct 2015
First published: 12 Oct 2015

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RSC Adv., 2015,5, 87667-87671

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The application of Zn_0.8Cd_0.2S nanocrystals in white light emitting diodes devices

Y. Chen, C. Siao, H. Chen, K. Wang and S. Chung, RSC Adv., 2015, 5, 87667 DOI: 10.1039/C5RA15068J

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