Premium
Variable‐Color Light‐Emitting Diodes Using GaN Microdonut arrays
Author(s) -
Tchoe Youngbin,
Jo Janghyun,
Kim Miyoung,
Heo Jaehyuk,
Yoo Geonwook,
Sone Cheolsoo,
Yi GyuChul
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201305684
Subject(s) - light emitting diode , materials science , optoelectronics , diode , biasing , variable (mathematics) , indium gallium nitride , green light , voltage , gallium nitride , optics , blue light , nanotechnology , layer (electronics) , physics , quantum mechanics , mathematical analysis , mathematics
Microdonut‐shaped GaN/In x Ga 1− 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.