Issue 18, 2021

High performance blue quantum light-emitting diodes by attaching diffraction wrinkle patterns

Abstract

Highly efficient blue quantum-dot light-emitting diodes (QLEDs) are still challenging to use in displays and solid-state lighting. Enhancing light outcoupling is one of the most effective methods to improve the performance of blue QLEDs. Here, a strategy for a spectrally independent boost in light outcoupling of blue QLEDs is demonstrated by quasi-periodic wrinkles, which are successfully used as a diffraction grating for extracting trapped light at the substrate/air interface. The quasi-periodic wrinkles can be adjusted from nano-scale to micron-scale under the condition of a constant aspect ratio, and the optimized wrinkle device shows a maximum luminance of 11 769 cd m−2 and a peak EQE of 15.41%. The enhancement of EQE is 49.5% higher compared to that of the reference device. Furthermore, simulation and calculation also indicate that external micron-scattering wrinkle patterns are an attractive option for boosting the performances of blue QLEDs.

Graphical abstract: High performance blue quantum light-emitting diodes by attaching diffraction wrinkle patterns

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
06 Jan 2021
Accepted
26 Mar 2021
First published
29 Mar 2021

Nanoscale, 2021,13, 8498-8505

High performance blue quantum light-emitting diodes by attaching diffraction wrinkle patterns

H. Qi, S. Wang, C. Li, Y. Zhao, B. Xu, X. Jiang, Y. Fang, A. Wang, H. Shen and Z. Du, Nanoscale, 2021, 13, 8498 DOI: 10.1039/D1NR00082A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements