Reminder: OSA/SPIE Seminar: LED for Solid State Lighting by Dr. Streubel / OSRAM -- Today, 4:15pm

The Optical Society of America / SPIE Stanford Student Chapter presents:

"Light Emitting Diodes for Solid State Lighting"
Speaker: Dr. Klaus Streubel, OSRAM Opto Semiconductors

Thursday, January 22, 2009
4:15pm, Ginzton Building, AP200
Refreshments at 4:00pm

Abstract:

Artificial light is an ubiquitous 'resource' for every day life. Due to a wide range of demands a huge variety of light sources has been invented in the past. Probably the most ingenious one are light emitting diodes (LEDs) which produce light by recombination of charge carriers in a solid. While formally only utilized as status indicators due to their limited power, today's LEDs have reached a status to revolutionize almost any lighting application in the near future.

The talk will illustrate the physical challenges for generating and extracting light using small and wide bandgap semiconductors. It will be highlighted how technologies, pioneered by OSRAM Opto Semiconductors, boosted the efficacy of InGaAlP and InGaN based light emitting diodes over the past decade. With the presented developments, the still ongoing race for ultimate efficacy and power already lead to devices which beat any other light source with respect to most demands and specifications. With its unique properties, LEDs even open up new opportunities as will be demonstrated by many examples. So there is time for a change in illumination and visualization.

About our speaker:

Dr. Klaus Streubel is Senior Director R&D at Osram Opto Semiconductors and head of the Conceptual Engineering department. He is responsible for the research and pre-development activities in the area of LEDs and Lasers at Osram OS. 

Dr. Streubel received his diploma and PhD degree in Physics from the University in Stuttgart. For his PhD, he developed MOPVE systems and growth processes for InGaAs semiconductors. He spent two years as a post doc at the Swedish Institute of Microelectronics in Stockholm, where he was involved in the development of semiconductor lasers. In 1993, Dr. Streubel took a permanent position at the Royal Institute of Technology (KTH) in Stockholm, where he received a lecturer certificate and was appointed as adjunct professor. At KTH he led and grew the long wavelength vertical cavity laser group and started a successful collaboration with the University of California in Santa Barbara.  

In 1997, Dr. Streubel switched from academic to industrial research. The following two years, he developed vertical cavity lasers and resonant-cavity LEDs at Mitel Semiconductors in Järfälla, before he joined Osram Opto Semiconductors in Regensburg, Gemany in 1999. At Osram he took the responsibility for the development of AlGaInP devices and initiated the implementation of thin-film technology for high-brightness LEDs.  

Dr. Streubel has authored and co-authored over 120 scientific publications and more than 100 conference contributions. In 2004 Dr. Streubel and his team were awarded with the Osram Innovation Award for his work on AlGaInP LEDs. In December 2007, he was awarded with the German Future Price of the German Federal President for the innovation of thin-film LEDs.