Fabrication of wide-bandgap transparent electrodes by using conductive filaments: Performance breakthrough in vertical-type GaN LED

Su Jin Kim, Hee Dong Kim, Kyeong Heon Kim, Hee Woong Shin, Il Ki Han, Tae Geun Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

For realizing next-generation solid-state lighting devices, performance breakthroughs must be accomplished for nitride-based light-emitting diodes (LEDs). Highly transparent conductive electrodes (TCEs) may be key to achieving this goal, as they provide uniform current injection and distribution across a large device area, eventually increasing the light output power. However, the trade-off between electrical conductivity and optical transmittance of LEDs must be addressed. Herein, we introduce a novel strategy based on TCEs fabricated using wide-bandgap (WB) materials such as SiNx, incorporated beneath the n-type electrode of vertical-type LEDs, and show the feasibility of this strategy. We employ a novel electrical breakdown (EBD) technique to form conductive filaments (or current paths) between a TCE and n-GaN (GaN: gallium nitride).Byemploying the EBD process, weobtain both ohmic behavior for SiNx TCE/n-GaN and a current spreading effect across n-GaN. These results demonstrate the tremendous potential of WB-TCEs for use in high-performance optoelectronic devices.

Original languageEnglish
Article number05827
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 2014 Jul 25

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filaments
light emitting diodes
fabrication
electrodes
electrical faults
gallium nitrides
optoelectronic devices
illuminating
nitrides
transmittance
injection
solid state
electrical resistivity
output

ASJC Scopus subject areas

  • General

Cite this

Fabrication of wide-bandgap transparent electrodes by using conductive filaments : Performance breakthrough in vertical-type GaN LED. / Kim, Su Jin; Kim, Hee Dong; Kim, Kyeong Heon; Shin, Hee Woong; Han, Il Ki; Kim, Tae Geun.

In: Scientific Reports, Vol. 3, 05827, 25.07.2014.

Research output: Contribution to journalArticle

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