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Nanomaterials 2018, 8(7), 508; https://doi.org/10.3390/nano8070508

Improvement in Color-Conversion Efficiency and Stability for Quantum-Dot-Based Light-Emitting Diodes Using a Blue Anti-Transmission Film

1
Engineering Research Center of Green Manufacturing for Energy-Saving and New-Energy Technology, South China University of Technology, Guangzhou 510640, China
2
Foshan Nationstar Optoelectronics Company Ltd., Foshan 528000, China
*
Author to whom correspondence should be addressed.
Received: 8 June 2018 / Revised: 27 June 2018 / Accepted: 2 July 2018 / Published: 9 July 2018
(This article belongs to the Special Issue Optoelectronic Nanodevices)
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Abstract

In this report, a blue anti-transmission film (BATF) has been introduced to improve the color-conversion efficiency (CCE) and the stability of quantum dot (QD) films. The results indicate that the CCE can be increased by as much as 93% using 15 layers of BATFs under the same QD concentration. Therefore, the same CCE can be achieved using BATF-QD hybrid films with a lower QD concentration when compared with standard QD films. The hybrid and QD films with the same CCE of 60% were aged at an environmental temperature of 25°C and with a 10 mA injection current light-emitting diode source. The CCE and luminous efficacy that are gained by the hybrid film increased by 42.8% and 24.5%, respectively, when compared with that gained by the QD film after aging for the same time period of approximately 65 h. In addition, the hybrid film can effectively suppress the red-shift phenomenon of the QD light spectra, as well as an expansion of the full-width at half maximum. Consequently, these BATF-QD hybrid films with excellent optical performance and stability show great potential for illumination and display applications. View Full-Text
Keywords: light-emitting diodes; quantum dots; stability; color-conversion efficiency; photoluminescence light-emitting diodes; quantum dots; stability; color-conversion efficiency; photoluminescence
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Li, J.; Tang, Y.; Li, Z.; Ding, X.; Yu, S.; Yu, B. Improvement in Color-Conversion Efficiency and Stability for Quantum-Dot-Based Light-Emitting Diodes Using a Blue Anti-Transmission Film. Nanomaterials 2018, 8, 508.

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