Distributed contact flip chip InGaN/GaN blue LED; comparison with conventional LEDs

Date
2019
Advisor
Instructor
Source Title
Superlattices and Microstructures
Print ISSN
0749-6036
Electronic ISSN
Publisher
Elsevier
Volume
128
Issue
Pages
9 - 13
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

This paper presents high performance, GaN/InGaN-based light emitting diodes (LEDs) in three different device configurations, namely Top Emitting (TE) LED, conventional Flip Chip (FC) and Distributed Contact (DC) FC. Series resistances as low as 1.1 Ω have been obtained from FC device configurations with a back reflecting ohmic contact of Ni/Au/RTA/Ni/Ag metal stack. A small shift has been observed between electroluminescence (EL) emissions of TE LED and the FC LEDs. In addition, FWHM value of the EL emission of DCFC LED has shown the minimum value of 160 meV (26.9 nm). Furthermore, DCFC LED configuration has shown the highest quantum efficiency and power output, with 330 mW at 500 mA current injection, compared to that of traditional wire bonded TE LEDs and the conventional FC LEDs.

Course
Other identifiers
Book Title
Keywords
Light emitting diodes, Luminescence, LED performance, Current distribution
Citation
Published Version (Please cite this version)