Your success is our goal




                                      SimuLED Success Stories

                              ...
Development of blue LED
                                                      structures grown by HVPE


                 ...
Development of ZnO-based
                                                            hybrid LEDs




                     ...
Designing of advanced EBLs for
                                                           III-nitride laser diodes




   ...
Optimization of MQW active region in
                                                       a dual-wavelength LED structur...
Development of CdZnO/GaN
                                                               SQW LEDs




                  usi...
Suppression of efficiency droop
                                                       in blue MQW LED structures

       ...
Hybrid approach for simulation of LED
                        operation is accepted by Philips and OSRAM


   About simula...
Optimization of electrode configuration
                                                               to suppress current...
Design of novel light-emitting devices
                                                                          and IP ge...
Our customers



          STR currently provides software and consulting services to over 40 companies and Academic
     ...
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SimuLED Success Stories

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SimuLED Success Stories

  1. 1. Your success is our goal SimuLED Success Stories Based on published studies only STR Group – Soft-Impact, Ltd. Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  2. 2. Development of blue LED structures grown by HVPE LED structures entirely grown by HVPE have been developed with modeling support and fabricated Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  3. 3. Development of ZnO-based hybrid LEDs TEM image of hybrid ZnMgO/ZnO/ AlGaN LED structure a novel ZnCdO/ZnO/AlGaN LED structure is designed and optimized by using SiLENSe prior its fabrication Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  4. 4. Designing of advanced EBLs for III-nitride laser diodes conventional EBL EBL based on a superlattice structure a new design of EBL based on superlattice structure has been suggested and optimized by SiLENSe in order to suppress electron leakage in a 405 nm laser diode structure Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  5. 5. Optimization of MQW active region in a dual-wavelength LED structure control of emission spectra by MQW barrier doping doping of MQW active region has bee optimized to improve the hole injection in all the wells Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  6. 6. Development of CdZnO/GaN SQW LEDs using modeling support, hybrid CdZnO/GaN LEDs were developed and fabricated for the first time Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  7. 7. Suppression of efficiency droop in blue MQW LED structures simulations experimental data an LED structure free of AlGaN EBL has been suggested on the basis of simulations, providing a smaller efficiency droop Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  8. 8. Hybrid approach for simulation of LED operation is accepted by Philips and OSRAM About simulation of current flowing in a LED chip The model implementation may be dramatically simplified by assuming that lateral current spreading only occurs in the n-layer. The model can be reduced a scheme, where the active region is presented as a contact resistance boundary between two semiconductor layers. Excerpt from T. Lopez and T. Margalith, 2008 Philips Research & Philips Lumileds Lighting Company Active region Diode equation By E. Baur, OSRAM Optosemiconductors GmbH, 2007
  9. 9. Optimization of electrode configuration to suppress current crowding improvement of LED performance due to appropriate chip design Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  10. 10. Design of novel light-emitting devices and IP generation IP generation based on results of modeling with SimuLED™ package Patent of Russian Federation No 2262155 issued by October 10, 2005 for UV LEDs Patent of Russian Federation No 2262156 for UV LEDs issued by October 10, 2005 Patent of Russian Federation No 2277736 for blue LEDs issued by June 10, 2006 Patent of Russian Federation No 2304952 for 808 nm high- issued by October 27, 2007 power laser diode Patent of Russian Federation No 2309501 for 808 nm high- issued by October 27, 2007 power laser diode Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com
  11. 11. Our customers STR currently provides software and consulting services to over 40 companies and Academic Institutions in USA, Europe, and Asia. We are grateful to those of our SimuLED™ customers from Academia who permitted us to refer their names: • Technische Universitat Berlin, Institut fur Festkorperphysik, Germany • Fraunhofer Institut Angewandte Festkörperphysik, Freiburg, Germany • Tokyo Institute of Technology, Japan • Industrial Technology Research Institute of Taiwan, Taiwan • School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA • Electrical & Engineering Department, University of Delaware, DE, USA • Korea Advanced Nano Fab Center (KANC) • College of Optics and Photonics, University of Central Florida, FL, USA • Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland • Department of Materials Science and Engineering, Meijo University, Nagoya, Japan • Department of Electrical Engineering, The National Central University, Jhongli, Taiwan • Youngnam University, Korea • Central Electronic Engineering Research Institute, India • Chonbuk University, Korea • Advanced Optoelectronic Devices Laboratory, National Taiwan University • Department of Applied Mathematics and Physics, State University, Vladimir, Russia • Interdisplinary Graduate School of Science and Engineering, Tokyo Institute of Technology • Semiconductor Device Laboratory, Yamaguchi University, Ube, Japan • Korea Polytechnic University, Siheung City, Korea • Gwangju Institute of Science and Technology, Gwangju, Korea Copyright © 2010 STR Group Ltd. All rights reserved www.str-soft.com

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