Nanorod-structured flip-chip GaN-based white light-emitting diodes

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

Abstract

To obtain high light output power and high phosphor conversion efficiency of the white light-emitting diodes (WLEDs), various methods including the reflectors and the surface roughness technique were intensively investigated. The improvement results of the relating researches about the reflectors and the surface roughness technique employed in the LEDs were discussed in this article. The light output power of the resulting LEDs with ZnO nanorod diffused reflectors improved 56.6% compared with the conventional LEDs. The LEDs with ZnO nanorod antireflection layer obviously enhanced the light extraction performance. Furthermore, the flip-chip white LEDs (FCWLEDs) with the diffused ZnO nanorod reflector and ZnO nanorod antireflection layer were also proposed in this article. The output power and phosphor conversion efficiency of FCWLEDs with diffused ZnO nanorod reflectors and ZnO nanorod arrays antireflection layer were improved to 23.91 mW and 80.1% compared with FCWLEDs with flat reflectors. These results verified that the both of the diffused ZnO nanorod reflector and the ZnO nanorod array antireflection layer could effectively guide more blue light to improve the light output power and the phosphor conversion efficiency of resulting LEDs.

Original languageEnglish
Title of host publicationLight-Emitting Diodes
Subtitle of host publicationMaterials, Devices, and Applications for Solid State Lighting XVIII
PublisherSPIE
ISBN (Print)9780819499165
DOIs
Publication statusPublished - 2014 Jan 1
EventLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII - San Francisco, CA, United States
Duration: 2014 Feb 42014 Feb 6

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9003
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII
CountryUnited States
CitySan Francisco, CA
Period14-02-0414-02-06

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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