Light extraction analysis of GaN-based LEDs

Tung Xian Lee, Kuo Fong Go, Te Yuan Chung, Ching Cherng Sun

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

7 Scopus citations


Optical analysis of the light extraction based on Monte-Carlo ray tracing in high-efficiency GaN-based LEDs with use of textured structure is presented. The simulation indicates that the introduction of micro pyramid array with slanted surfaces can effectively improve the light extraction efficiency. In addition, the light extraction of three types of LED with or without an epoxy lens is analyzed, where the patterned substrate with pyramid structure arrays is shown most effective way to increase light extraction efficiency in an encapsulated LED with an epoxy lens.

Original languageEnglish
Title of host publicationGallium Nitride Materials and Devices II
StatePublished - 2007
EventGallium Nitride Materials and Devices II - San Jose, CA, United States
Duration: 22 Jan 200725 Jan 2007

Publication series

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


ConferenceGallium Nitride Materials and Devices II
Country/TerritoryUnited States
CitySan Jose, CA


  • GaN-based LED
  • Light extraction efficiency
  • Monte-Carlo ray tracing
  • Textured surface


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