Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes

doi:10.3390/mi9120650

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	Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes
	Zhou, S. J.; Xu, H. H.; Liu, M. L.; Liu, X. T.; Zhao, J.; Li, N.; Liu, S.
	2018
发表期刊	Micromachines
ISSN	2072-666X
卷号	9 期号:12 页码:9
摘要	We demonstrated two types of GaN-based flip-chip light-emitting diodes (FCLEDs) with distributed Bragg reflector (DBR) and without DBR to investigate the effect of dielectric TiO2/SiO2 DBR on optical and electrical characteristics of FCLEDs. The reflector consisting of two single TiO2/SiO2 DBR stacks optimized for different central wavelengths demonstrates a broader reflectance bandwidth and a less dependence of reflectance on the incident angle of light. As a result, the light output power (LOP) of FCLED with DBR shows 25.3% higher than that of FCLED without DBR at 150 mA. However, due to the better heat dissipation of FCLED without DBR, it was found that the light output saturation current shifted from 268 A/cm(2) for FCLED with DBR to 296 A/cm(2) for FCLED without DBR. We found that the use of via-hole-based n-type contacts can spread injection current uniformly over the entire active emitting region. Our study paves the way for application of DBR and via-hole-based n-type contact in high-efficiency FCLEDs.
关键词	flip-chip light-emitting diodes distributed Bragg reflector light output power external quantum efficiency quantum-well p-type leds performance wavelength contacts ito/dbr laser power fabrication Science & Technology - Other Topics Instruments & Instrumentation
DOI	10.3390/mi9120650
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60963
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Zhou, S. J.,Xu, H. H.,Liu, M. L.,et al. Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes[J]. Micromachines,2018,9(12):9.
APA	Zhou, S. J..,Xu, H. H..,Liu, M. L..,Liu, X. T..,Zhao, J..,...&Liu, S..(2018).Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes.Micromachines,9(12),9.
MLA	Zhou, S. J.,et al."Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes".Micromachines 9.12(2018):9.

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