Enhancement of angular flux utilization and light extraction efficiency based on micro array in GaN LEDs

Ching Cherng Sun, Shang Yu Tsai, Tsung Xian Lee, Wei Ting Chien

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper, based on Monte Carlo ray tracing we simulate light extraction efficiency and directionality of the light pattern of GaN LEDs implanted with micro-pyramid structure with or without lens encapsulation. We have shown that micro-pyramid structures at some specific slanted angles in the LEDs are useful to increase effective flux utilization through enhancement of both the directionality and light extraction efficiency.

Original languageEnglish
Title of host publicationLight-Emitting Diodes
Subtitle of host publicationMaterials, Devices, and Applications for Solid State Lighting XIV
DOIs
StatePublished - 2010
EventLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV - San Francisco, CA, United States
Duration: 26 Jan 201028 Jan 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7617
ISSN (Print)0277-786X

Conference

ConferenceLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV
Country/TerritoryUnited States
CitySan Francisco, CA
Period26/01/1028/01/10

Keywords

  • Directionality
  • Light extraction efficiency
  • Monte Carlo ray tracing
  • Pyramid array

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