Scalability of buried microreflector light-emitting diodes for high-current applications

Stefan Illek; Ines Pietzonka; Andreas Ploessl; Peter Stauss; Walter Wegleiter; Reiner Windisch; Ralph Wirth; Heribert Zull; Klaus P. Streubel

doi:10.1117/12.476550

3 July 2003 Scalability of buried microreflector light-emitting diodes for high-current applications

Stefan Illek, Ines Pietzonka, Andreas Ploessl, Peter Stauss, Walter Wegleiter, Reiner Windisch, Ralph Wirth, Heribert Zull, Klaus P. Streubel

Author Affiliations +

Proceedings Volume 4996, Light-Emitting Diodes: Research, Manufacturing, and Applications VII; (2003) https://doi.org/10.1117/12.476550
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

The combination of wafer soldering using metal layers and the introduction of buried micro-reflector structures has proven to be a promising approach to fabricate high brightness, substrate-less LEDs in the AlGaInP material system. In addition to the enhanced light output, the scalability of this approach has been predicted as a major advantage. In contrast to other approaches, larger area LEDs can be fabricated without altering the epitaxial structure and thickness of layers simply by offering a larger area for light generation. First samples of amber (λ = 615 nm) buried micro-reflector LEDs with side-length up to 1000 μm have been realized. Devices mounted in packages with improved heat sinks are capable of low voltage CW operation with currents as high as 600 mA (V_fw≤ 2,8 V) without significant thermal flattening of the light-current characteristics. The maximum luminous flux achieved at these oeprating conditions is 46 lumen. Already these first experiments demonstrate the potential of the concept of buried micro-reflector LEDs not only for high-brightness but also for high-current operation. The results are among the best values of high-flux LEDs in this wavelength range.

Citation Download Citation

Stefan Illek, Ines Pietzonka, Andreas Ploessl, Peter Stauss, Walter Wegleiter, Reiner Windisch, Ralph Wirth, Heribert Zull, and Klaus P. Streubel "Scalability of buried microreflector light-emitting diodes for high-current applications", Proc. SPIE 4996, Light-Emitting Diodes: Research, Manufacturing, and Applications VII, (3 July 2003); https://doi.org/10.1117/12.476550

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available