Jump to main content
Jump to site search

Issue 1, 2018
Previous Article Next Article

An effective approach to alleviating the thermal effect in microstripe array-LEDs via the piezo-phototronic effect

Author affiliations

Abstract

Micro-LEDs, with unparalleled high brightness compared to conventional LEDs and OLEDs, have been regarded as a research priority for high-power light emitting diodes. Thermal issue is an inevitable concern in LED operation, leading to luminescence degradation and lifetime shortening. Here we studied the role the piezo-phototronic effect played in the luminescence enhancement of microstripe array-LEDs via strain compensation at room temperature. And also, we firstly reveal the effective modulation of the piezo-phototronic effect on luminescence characteristics at high temperatures via EL measurements with the temperature increasing from 300 K to 380 K. Industrial GaN-based high-power LEDs have been reported to be commonly operated in the temperature range of 70–90 °C. Compared to at 300 K, the integrated EL intensity at 364 K decreases to 67.8% without strain; however, by applying a strain of 0.09%, it is demonstrated to rise to as high as 104% of that at 300 K. This work deepens the understanding of the high-temperature piezo-phototronic effect and will give significant guidance for high-power LEDs from the important direction of nitride semiconductors.

Graphical abstract: An effective approach to alleviating the thermal effect in microstripe array-LEDs via the piezo-phototronic effect

Back to tab navigation

Supplementary files

Article information


Submitted
24 Oct 2017
Accepted
23 Nov 2017
First published
23 Nov 2017

Mater. Horiz., 2018,5, 116-122
Article type
Communication

An effective approach to alleviating the thermal effect in microstripe array-LEDs via the piezo-phototronic effect

C. Du, L. Jing, C. Jiang, T. Liu, X. Pu, J. Sun, D. Li and W. Hu, Mater. Horiz., 2018, 5, 116
DOI: 10.1039/C7MH00876G

Social activity

Search articles by author

Spotlight

Advertisements