Cart (Loading....) | Create Account
Close category search window
 

High power LEDs for solid state lighting

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Hahn, B. ; Osram Opto Semicond., Regensburg, Germany

For solid stated lighting high light output in combination with high conversion efficacy is essential. High efficiencies are relatively easy to realize at low current densities, but efficiency tends to decline as the current is cranked up. In order to overcome the barriers for high flux LEDs, both epitaxy and chip design have to be optimized. In this paper we report on the improvement of ThinGaN®PowerLED structures in epitaxy, chip design, phosphor efficiency and package design. A key for improving LED performance is understanding the carrier loss mechanisms in blue and green epitaxy structures. Assuming an indirect Auger effect as one of the major loss mechanisms in InGaN LEDs, a reduction of the carrier density per emitting well is enabling efficiency improvement for blue/green LEDs. Along with improved epi designs the extraction efficiency had to be improved. A new chip design allows high current operation in combination with efficiencies beyond 1001m/W for white. New conversion schemes allow the fabrication of extremely efficient green light sources, which enable new generations of high flux projection applications.

Published in:

Solid-State Device Research Conference (ESSDERC), 2010 Proceedings of the European

Date of Conference:

14-16 Sept. 2010

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.