Jump to main content
Jump to site search

Issue 2, 2015
Previous Article Next Article

Flexible quantum dot–PVA composites for white LEDs

Author affiliations


Integration of blue light-emitting diode (LED) chips with yellow phosphors has been the most practical way to achieve white lighting, but finding a low-cost alternative for Y3Al5O12:Ce3+ (YAG:Ce) phosphors, which are expensive and lack red emission, is still a great challenge. The present report documents a strategy of combining quantum dot–polyvinyl alcohol (PVA) composites and blue chips for white LEDs. Cadmium-free and water-soluble ZnSe:Mn/ZnS quantum dots (QDs) were synthesized through a nucleation doping strategy, and then embedded in PVA. The flexible composite contains well-dispersed QDs and exhibits highly efficient photoluminescence at 590–635 nm, and hence is available for resin-free white LEDs. Besides excellent stability, the assembled white LEDs possess promising color characteristics, including a color rendering index (CRI) value of 93.5, a correlated color temperature (CCT) of 2913 K at Commission Internationale de l'Eclairage (CIE) color coordinates of (0.41,0.37), and a luminous efficacy (LE) of 18.9 lm W−1 under 300 mA current excitation. This work demonstrates that such a silica-coated QD–PVA composite plate, as a reliable color converter, would be promising for the next-generation QD-based LEDs.

Graphical abstract: Flexible quantum dot–PVA composites for white LEDs

Back to tab navigation

Supplementary files

Article information

08 Oct 2014
13 Nov 2014
First published
14 Nov 2014

J. Mater. Chem. C, 2015,3, 257-264
Article type
Author version available

Flexible quantum dot–PVA composites for white LEDs

A. Cosgun, R. Fu, W. Jiang, J. Li, J. Song, X. Song and H. Zeng, J. Mater. Chem. C, 2015, 3, 257
DOI: 10.1039/C4TC02256D

Social activity

Search articles by author