Design principles of external and internal patterns for efficient light extraction

Sun Kyung Kim; Hong Gyu Park

doi:10.3938/jkps.64.471

Design principles of external and internal patterns for efficient light extraction

Sun Kyung Kim, Hong Gyu Park

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We studied external and internal patterns for boosting light extraction from GaN light-emitting diodes (LEDs). With a transparent conductive layer (TCL) inserted between an external pattern and an upper GaN plane, light extraction increased in a thin, high-refractive-index TCL. A periodic array of air voids embedded in a GaN medium yielded an extraction efficiency similar to the external pattern's one. For double-layer patterns, as the internal pattern was close to multiple quantum wells within a wavelength, the extraction efficiency was enhanced ∼30% over that of a single-layer pattern. This work will be useful for designing blue-to-ultraviolet-emitting GaN-based LEDs with multi-layer patterns.

Original language	English
Pages (from-to)	471-475
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	64
Issue number	3
DOIs	https://doi.org/10.3938/jkps.64.471
Publication status	Published - 2014 Feb

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea grant No. 2009-0081565 funded by the Korean government Ministry of Science, Information Communications Technology, and Future Planning (MSIP).

Keywords

Finite-difference time-domain method
Light-emitting diodes
Photonic crystal

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.3938/jkps.64.471

Cite this

@article{549a810431fe4f4da98a9ad3dc0149ef,

title = "Design principles of external and internal patterns for efficient light extraction",

abstract = "We studied external and internal patterns for boosting light extraction from GaN light-emitting diodes (LEDs). With a transparent conductive layer (TCL) inserted between an external pattern and an upper GaN plane, light extraction increased in a thin, high-refractive-index TCL. A periodic array of air voids embedded in a GaN medium yielded an extraction efficiency similar to the external pattern's one. For double-layer patterns, as the internal pattern was close to multiple quantum wells within a wavelength, the extraction efficiency was enhanced ∼30% over that of a single-layer pattern. This work will be useful for designing blue-to-ultraviolet-emitting GaN-based LEDs with multi-layer patterns.",

keywords = "Finite-difference time-domain method, Light-emitting diodes, Photonic crystal",

author = "Kim, {Sun Kyung} and Park, {Hong Gyu}",

note = "Funding Information: This work was supported by the National Research Foundation (NRF) of Korea grant No. 2009-0081565 funded by the Korean government Ministry of Science, Information Communications Technology, and Future Planning (MSIP).",

year = "2014",

month = feb,

doi = "10.3938/jkps.64.471",

language = "English",

volume = "64",

pages = "471--475",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

publisher = "Korean Physical Society",

number = "3",

}

TY - JOUR

T1 - Design principles of external and internal patterns for efficient light extraction

AU - Kim, Sun Kyung

AU - Park, Hong Gyu

N1 - Funding Information: This work was supported by the National Research Foundation (NRF) of Korea grant No. 2009-0081565 funded by the Korean government Ministry of Science, Information Communications Technology, and Future Planning (MSIP).

PY - 2014/2

Y1 - 2014/2

N2 - We studied external and internal patterns for boosting light extraction from GaN light-emitting diodes (LEDs). With a transparent conductive layer (TCL) inserted between an external pattern and an upper GaN plane, light extraction increased in a thin, high-refractive-index TCL. A periodic array of air voids embedded in a GaN medium yielded an extraction efficiency similar to the external pattern's one. For double-layer patterns, as the internal pattern was close to multiple quantum wells within a wavelength, the extraction efficiency was enhanced ∼30% over that of a single-layer pattern. This work will be useful for designing blue-to-ultraviolet-emitting GaN-based LEDs with multi-layer patterns.

AB - We studied external and internal patterns for boosting light extraction from GaN light-emitting diodes (LEDs). With a transparent conductive layer (TCL) inserted between an external pattern and an upper GaN plane, light extraction increased in a thin, high-refractive-index TCL. A periodic array of air voids embedded in a GaN medium yielded an extraction efficiency similar to the external pattern's one. For double-layer patterns, as the internal pattern was close to multiple quantum wells within a wavelength, the extraction efficiency was enhanced ∼30% over that of a single-layer pattern. This work will be useful for designing blue-to-ultraviolet-emitting GaN-based LEDs with multi-layer patterns.

KW - Finite-difference time-domain method

KW - Light-emitting diodes

KW - Photonic crystal

UR - http://www.scopus.com/inward/record.url?scp=84894761400&partnerID=8YFLogxK

U2 - 10.3938/jkps.64.471

DO - 10.3938/jkps.64.471

M3 - Article

AN - SCOPUS:84894761400

SN - 0374-4884

VL - 64

SP - 471

EP - 475

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 3

ER -

Design principles of external and internal patterns for efficient light extraction

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this