Control of characteristic performance by patterned structure in light-emitting diodes

Jong Hyeob Baek, Sang Mook Kim, In-Hwan Lee, Nam Hwang

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

1 Citation (Scopus)

Abstract

Various types of nano-to-micron scale patterned structure have been employed into nitride light-emitting diodes (LEDs) in order to investigate the optical performances of device. The patterned structure was formed on top of the LED epitaxial structure or was embedded between epitaxial layers and sapphire substrate. The patterned structure affected to the LED performances in terms of light distribution and anisotropic increase of light extraction as well as increase of external quantum efficiency. The controllability of light extraction by forming a patterned structure with different index material is applicable to flip chip devices or chips on board in which light is supposed to be extracted toward a certain direction with the straight forward directionality. The index matched nano-patterned AlN template played such a role of anisotropic directionality of light extraction in the device. Periodic (photonic band gap) and non-periodic (random hole) patterned structure also showed different extraction efficiency and characteristics of light distribution. The experimental result was well matched with the simulated estimation.

Original languageEnglish
Title of host publicationQuantum Sensing and Nanophotonic Devices VIII
DOIs
Publication statusPublished - 2011 May 13
Externally publishedYes
EventQuantum Sensing and Nanophotonic Devices VIII - San Francisco, CA, United States
Duration: 2011 Jan 232011 Jan 27

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7945
ISSN (Print)0277-786X

Conference

ConferenceQuantum Sensing and Nanophotonic Devices VIII
CountryUnited States
CitySan Francisco, CA
Period11/1/2311/1/27

Fingerprint

Diode
Light emitting diodes
light emitting diodes
Flip chip devices
chips
Flip chip
Aluminum Nitride
Photonic band gap
Photonic Band Gap
Nitrides
Aluminum Oxide
Sapphire
Quantum Efficiency
controllability
Epitaxial layers
Controllability
Quantum efficiency
Straight
nitrides
Template

Keywords

  • LED
  • light distribution
  • light extraction
  • nano-patterning
  • photonic crystal

ASJC Scopus subject areas

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

Cite this

Baek, J. H., Kim, S. M., Lee, I-H., & Hwang, N. (2011). Control of characteristic performance by patterned structure in light-emitting diodes. In Quantum Sensing and Nanophotonic Devices VIII [79451B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7945). https://doi.org/10.1117/12.871428

Control of characteristic performance by patterned structure in light-emitting diodes. / Baek, Jong Hyeob; Kim, Sang Mook; Lee, In-Hwan; Hwang, Nam.

Quantum Sensing and Nanophotonic Devices VIII. 2011. 79451B (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7945).

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

Baek, JH, Kim, SM, Lee, I-H & Hwang, N 2011, Control of characteristic performance by patterned structure in light-emitting diodes. in Quantum Sensing and Nanophotonic Devices VIII., 79451B, Proceedings of SPIE - The International Society for Optical Engineering, vol. 7945, Quantum Sensing and Nanophotonic Devices VIII, San Francisco, CA, United States, 11/1/23. https://doi.org/10.1117/12.871428
Baek JH, Kim SM, Lee I-H, Hwang N. Control of characteristic performance by patterned structure in light-emitting diodes. In Quantum Sensing and Nanophotonic Devices VIII. 2011. 79451B. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.871428
Baek, Jong Hyeob ; Kim, Sang Mook ; Lee, In-Hwan ; Hwang, Nam. / Control of characteristic performance by patterned structure in light-emitting diodes. Quantum Sensing and Nanophotonic Devices VIII. 2011. (Proceedings of SPIE - The International Society for Optical Engineering).
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