Variable-color light-emitting diodes using GaN microdonut arrays

Youngbin Tchoe; Janghyun Jo; Miyoung Kim; Jaehyuk Heo; Geonwook Yoo; Cheolsoo Sone; Gyu-Chul Yi

doi:10.1002/adma.201305684

Variable-color light-emitting diodes using GaN microdonut arrays

Adv Mater. 2014 May 21;26(19):3019-23. doi: 10.1002/adma.201305684. Epub 2014 Feb 22.

Authors

Youngbin Tchoe¹, Janghyun Jo, Miyoung Kim, Jaehyuk Heo, Geonwook Yoo, Cheolsoo Sone, Gyu-Chul Yi

Affiliation

¹ Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea.

PMID: 24677202
DOI: 10.1002/adma.201305684

Abstract

Microdonut-shaped GaN/Inx Ga1-x N light-emitting diode (LED) microarrays are fabricated for variable-color emitters. The figure shows clearly donut-shaped light emission from all the individual microdonut LEDs. Furthermore, microdonut LEDs exhibit spatially-resolved blue and green EL colors, which can be tuned by either controlling the external bias voltage or changing the size of the microdonut LED.

Keywords: and indium gallium nitride; light-emitting diodes; multicolor; nanostructure; quantum well.

Publication types

Research Support, Non-U.S. Gov't