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Proceedings Article

Light-emitting diodes for solid-state lighting: searching room for improvements

[+] Author Affiliations
Sergey Y. Karpov

STR Group-Soft Impact Ltd. (Russian Federation)

Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 97680C (March 8, 2016); doi:10.1117/12.2207265
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From Conference Volume 9768

  • Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX
  • Heonsu Jeon; Li-Wei Tu; Michael R. Krames; Martin Strassburg
  • San Francisco, California, United States | February 13, 2016

abstract

State-of-the art light-emitting diodes (LEDs) for solid-state lighting (SSL) are reviewed with the focus on their efficiency and ways for its improvement. Mechanisms of the LED efficiency losses are considered on the heterostructure, chip, and device levels, including high-current efficiency droop, recombination losses, “green gap”, current crowding, Stokes losses, etc. Materials factors capable of lowering the LED efficiency, like composition fluctuations in InGaN alloys and plastic stress relaxation in device heterostructures, are also considered. Possible room for the efficiency improvement is discussed along with advanced schemes of color mixing and LED parameters optimal for generation of high-quality white light. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Sergey Y. Karpov
" Light-emitting diodes for solid-state lighting: searching room for improvements ", Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 97680C (March 8, 2016); doi:10.1117/12.2207265; http://dx.doi.org/10.1117/12.2207265


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