Improvement in Light Output of Ultraviolet Light-Emitting Diodes with Patterned Double-Layer ITO by Laser Direct Writing

doi:10.3390/nano9020203

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	Improvement in Light Output of Ultraviolet Light-Emitting Diodes with Patterned Double-Layer ITO by Laser Direct Writing
	J.Zhao; X.H.Ding; J.H.Miao; J.F.Hu; H.Wan; S.J.Zhou
	2019
发表期刊	Nanomaterials
ISSN	2079-4991
卷号	9 期号:2 页码:9
摘要	A patterned double-layer indium-tin oxide (ITO), including the first unpatterned ITO layer serving as current spreading and the second patterned ITO layer serving as light extracting, was applied to obtain uniform current spreading and high light extraction efficiency (LEE) of GaN-based ultraviolet (UV) light-emitting diodes (LEDs). Periodic pinhole patterns were formed on the second ITO layer by laser direct writing to increase the LEE of UV LED. Effects of interval of pinhole patterns on optical and electrical properties of UV LED with patterned double-layer ITO were studied by numerical simulations and experimental investigations. Due to scattering out of waveguided light trapped inside the GaN film, LEE of UV LED with patterned double-layer ITO was improved as compared to UV LED with planar double-layer ITO. As interval of pinhole patterns decreased, the light output power (LOP) of UV LED with patterned double-layer ITO increased. In addition, UV LED with patterned double-layer ITO exhibited a slight degradation of current spreading as compared to the UV LED with a planar double-layer ITO. The forward voltage of UV LED with patterned double-layer ITO increased as the interval of pinhole patterns decreased.
关键词	UV LEDs,double-layer ITO,pinhole pattern,current spreading,light,output power,thin-films,transparent,electrodes,efficiency,leds,surface,blue,inactivation,enhancement,irradiation,Science & Technology - Other Topics,Materials Science
DOI	10.3390/nano9020203
收录类别	SCI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62758
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	J.Zhao,X.H.Ding,J.H.Miao,et al. Improvement in Light Output of Ultraviolet Light-Emitting Diodes with Patterned Double-Layer ITO by Laser Direct Writing[J]. Nanomaterials,2019,9(2):9.
APA	J.Zhao,X.H.Ding,J.H.Miao,J.F.Hu,H.Wan,&S.J.Zhou.(2019).Improvement in Light Output of Ultraviolet Light-Emitting Diodes with Patterned Double-Layer ITO by Laser Direct Writing.Nanomaterials,9(2),9.
MLA	J.Zhao,et al."Improvement in Light Output of Ultraviolet Light-Emitting Diodes with Patterned Double-Layer ITO by Laser Direct Writing".Nanomaterials 9.2(2019):9.

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