文章基本信息

标题：Fabrication of wide-bandgap transparent electrodes by using conductive filaments: Performance breakthrough in vertical-type GaN LED
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作者：Su Jin Kim ; Hee-Dong Kim ; Kyeong Heon Kim 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep05827
语种：English
出版社：Springer Nature
摘要：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 SiN_x, 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). By employing the EBD process, we obtain both ohmic behavior for SiN_x 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.