Flexible White Light Emitting Diodes Based on Nitride Nanowires and Nanophosphors

Overview

Journal ACS Photonics

Publisher American Chemical Society

Date 2016 Jun 23

PMID 27331079

Citations 15

Authors

Nan Guan

Xing Dai

Agnes Messanvi

Hezhi Zhang

Jianchang Yan

Eric Gautier

Catherine Bougerol

Francois H Julien

Christophe Durand

Joel Eymery

Maria Tchernycheva

Affiliations

Soon will be listed here.

Abstract

We report the first demonstration of flexible white phosphor-converted light emitting diodes (LEDs) based on p-n junction core/shell nitride nanowires. GaN nanowires containing seven radial InGaN/GaN quantum wells were grown by metal-organic chemical vapor deposition on a sapphire substrate by a catalyst-free approach. To fabricate the flexible LED, the nanowires are embedded into a phosphor-doped polymer matrix, peeled off from the growth substrate, and contacted using a flexible and transparent silver nanowire mesh. The electroluminescence of a flexible device presents a cool-white color with a spectral distribution covering a broad spectral range from 400 to 700 nm. Mechanical bending stress down to a curvature radius of 5 mm does not yield any degradation of the LED performance. The maximal measured external quantum efficiency of the white LED is 9.3%, and the wall plug efficiency is 2.4%.

Citing Articles

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