A two-dimensional analysis on high light extraction efficiency (LEE) LEDs with asymmetric micro-structured substrate

Chang Jiang Chen, Wenbin Zhu, Ju Hung Chao, Haonan Zhou, Shizhuo Yin

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This paper presents a quantitative two-dimensional (2D) analysis on high power GaN light emitting diodes (LEDs) fabricated on asymmetric micro-structured substrates. It is found that the light extraction efficiency (LEE) can be substantially improved from conventional symmetric structure to asymmetric structure. The increase of LEE is mainly dedicated to the increased surface area and better randomization on the direction of transmitted/reflected light, which enhances the escaping probability after multiple reflections. This quantitative 2D analysis lays down a solid foundation for the future quantitative 3D analysis.

    Original languageEnglish (US)
    Title of host publicationPhotonic Fiber and Crystal Devices
    Subtitle of host publicationAdvances in Materials and Innovations in Device Applications XI
    EditorsShizhuo Yin, Ruyan Guo
    PublisherSPIE
    Volume10382
    ISBN (Electronic)9781510612211
    DOIs
    StatePublished - Jan 1 2017
    EventPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI 2017 - San Diego, United States
    Duration: Aug 6 2017Aug 7 2017

    Other

    OtherPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI 2017
    CountryUnited States
    CitySan Diego
    Period8/6/178/7/17

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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