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Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
Why SimuLED
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Why SimuLED

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10 reasons to use it

10 reasons to use it

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  • This presentation was published at LinkedIn.com by Alex Galyukov
    http://www.linkedin.com/in/alexgalyukov
    http://www.str-soft.com/products/SimuLED/
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  • 1. In those moments when experiment gives you not what you expected, don't you wish you could see inside the chip? Why SimuLED 10 reasons to use it Copyright © 2009 STR Group Ltd. All rights reserved
  • 2. Why SimuLED? Problem to be solved is: Multidisciplinary - materials science - physics of semiconductors - heat transfer - optics Nonlinear - Non-linear p-n junction conductivity - Self-heating effects Multidimensional and multiscale - QW thickness of ~2-10nm - chip size of ~300µm Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 3. Why SimuLED? How to approach? Experiment - labour-intensive - time consuming + - expensive - some details of particular processes/mechanisms can not be measured directly or visualized Modeling/Simulations - modeling is recognized as a powerful tool for device engineering - fast reply could be obtained in respond to “what if” questions - relatively inexpensive Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 4. Why SimuLED? Will any software help? Common pitfalls of general purpose software: • Specific experience in modeling is often necessary to run general purpose software and to extract useful results from computations • 3D geometry specification is often labour-intensive • Nonlinear problems tend to have poor convergence • Huge simulation time and computer resources demanded. Special requests to hardware used for computations • Non-intuitive user interface might take long time to understand and get started • Materials properties often have to be collected is tailored for specific application and SimuLED™ operates in engineer friendly terms, therefore, bypassing the common issues listed above Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 5. Why SimuLED? Maximum efficiency is the key SimuLED is optimized for maximum efficiency in terms of user effort and computer resources. High performance is achieved in several ways: software employs unique models of the physical processes, it uses problem specific methods and algorithms to find the solution and smart modularization. It allows SimuLED to operate very fast, as compared to general purpose software. For the user convenience, task set-up can be done in terms customarily used in device engineering. A set of examples provides selection of ready-to-run tasks that can be used as a starting point in some cases. Material properties are thoroughly selected and stored in an internal database, ready to be used in computations. Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 6. Why SimuLED? Argument 1: Easy problem set up Intuitive User Interface operates in terms used by engineers Layer by layer input of 2D layout for 3D geometry Import of CAD files is supported Built-in editable database of materials properties, which allows the user to start computations immediately Set of examples, which can be used as a simulation starting point to further minimize user efforts SimuLED allows to set up diode geometry layer by layer, bypassing time consuming and complex task of 3D geometry specification. Just draw a “plan” and specify thickness for each layer. Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 7. Why SimuLED? Argument 2: Fast and robust solver Built-in flexible automatic grid-generator, supporting structured, unstructured, and mismatched grids (manual tuning of automatically generated grid is also available) Numeric algorithms are adopted specially for LED simulation Automatic relaxation of nonlinear problem solution, providing reliable convergence and efficient use of CPU time Smart modularization and 1D/3D hybrid approach (for more details see http://www.semitech.us/products/SimuLED/) Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 8. Why SimuLED? Argument 3: Easy to interpret results 0 330 30 300 60 SimuLEDView is a specialized viewer developed for thorough analysis of LED computations 270 90 240 120 3D and 2D distributions of computed parameters 210 150 can be visualized 180 Probe function is available Integral parameters characterizing LED performance are calculated automatically Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 9. Why SimuLED? Argument 4: SimuLED is tailored for device engineers In those moments when experiment gives you not what you expected, don't you wish you could see inside the chip? Simulate and visualize processes inside LEDs and LDs from internal quantum efficiency of heterostructure to light extraction from the die. Processes and physical effects taken into account are shown in our detailed presentation located at http://www.str-soft.com/products/SimuLED/ Designed for device engineers without experience in numerical simulations: - easy to learn and to use - navigation and controls are intuitive - operates in familiar terms. Can be used to: - try different designs and optimization steps in a fast, easy manner - plan the experiment - get a better insight into the experimental results Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 10. Why SimuLED? Argument 5: SimuLED is an exellent supplementary tool for epi-growth teams SimuLED can be effectively used by engineers involved in epitaxial growth of LED and LD heterostructures to extract the heterostructures characteristics from the experimental data obtained for a LED chip. With SimuLED, they will be able to distinguish between the heterostructure properties, current spreading, and light extraction. Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 11. Why SimuLED? Argument 6: SimuLED can be used for education and training SimuLED software package can be used as an educational aid: - Easy to learn and works fast - Students can get results of numerous numerical experiments when time is pressing - Learn to integrate computations into their work - Supplement their thesis with computation results - Get a feel of how stuff works without any waist of materials or equipment amortization - Preset examples included in the package can serve as a basis for the program SimuLED is also a “flight simulator” for device engineers. It can be effectively used in personnel training – test the performance of your heterostructure, design contact configuration, and see how LED or LD will work at no cost for materials and equipment. Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 12. Why SimuLED? Argument 7: SimuLED is used to conduct research and generate intellectual property SimuLED is currently used by a number of research groups. It is also used to generate intellectual property for further industrial use, as it allows to try out design ideas, to test proposed heterostructures, to see how ones ideas would work when implemented. Examples of research work conducted using SimuLED: The effect of silicon doping in the selected barrier on the electroluminescence of InGaN/GaN multiquantum well light emitting diode. Appl. Phys. Lett. 90, 031102 (2007) Eun-Hyun Park, David Nicol Hun Kang, and Ian T. Ferguson School of Electrical and Computer Engineering, 777 Atlantic Drive, Georgia Institute of Technology, Atlanta, Georgia 30332-0250 Soo-Kun Jeon Joong-Seo Park and Tae-Kyung Yoo EpiValley, Co., Ltd., 51-2 Neungpyeong-Ri, Opo-Eup, Kwangju City, Kyunggi-Do, Korea Theoretical study of current overflow in GaN based light emitters with superlattice cladding layers. J. Appl. Phys. 100, 016103 (2006) S. P. Lepkowski and S. Krukowski Unipress, Institute of High Pressure Physics, Polish Academy of Sciences, ulica Soko owska 29, 01-142 Warszawa, Poland Design and simulation of ZnO-based light-emitting diode structures. J. Vac. Sci. Technol. B Volume 23 (6) 2005, p. 2504 Sang Youn Han, Hyucksoo Yang, D. P. Norton, S. J. Pearton, F. Ren, A. Osinsky, J. W. Dong, B. Hertog, and P. P. Chow Effect of electron blocking layer on efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes. Appl. Phys. Lett. 94, 231123 2009 Sang-Heon Han,1,2 Dong-Yul Lee,2 Sang-Jun Lee,1 Chu-Young Cho,1 Min-Ki Kwon,1 S. P. Lee,1 D. Y. Noh,1 Dong-Joon Kim,2 Yong Chun Kim,2 and Seong-Ju Park1 1Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea 2Samsung Electro-Mechanics, Suwon 443-743, Republic of Korea Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 13. Why SimuLED? Evidence for importance of Auger recombination What SimuLED can give as a research result: with SimuLED experiment ICNS-2007 Role of the Auger recombination in IQE droop STR predicted it using SimuLED and Lumileds showed it experimentally Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 14. Why SimuLED? Argument 8: Interdigitated Multi-Pixel Array (IMPA) Developed originally for simulation of a single LED device, SimuLED can now be applied to simulation of Interdigitated Multi-Pixel Array (IMPA) and was successfully tested on hundred 30x30 µm2 pixel LEDs integrated on a common sapphire substrate. Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 15. Why SimuLED? Argument 9: Outstanding Customer Support We help our customers to start using software quickly and efficiently We answer any questions regarding software operation in promptly and detailed manner Our support team helps customers to interpret results In some cases, SimuLED can be customized to meet particular user requests We conduct software demonstration and brief training via remote screen sharing Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com
  • 16. Why SimuLED? Argument 10: Try it before you buy it Test-drive SimuLED and see how it works for your heterostructure: - Trial license is free - Trial includes full support and help getting started Contact us to receive your free trial license at http://www.str-soft.com/contact Download demo versions and presentations at http://downloads.str-soft.com/ Copyright © 2009 STR Group Ltd. All rights reserved www.str-soft.com

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