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Improved performance of UV-LED by p-AlGaN with graded composition
Yan, Jianchang; Wang, Junxi; Cong, Peipei; Sun, Lili; Liu, Naixin; Liu, Zhe; Zhao, Chao; Li, Jinmin; Yan, J.(yanjc@semi.ac.cn)
2011
Source PublicationPhysica Status Solidi(C) Current Topics in Solid State Physics
ISSN18626351
Volume8Issue:2Pages:461-463
AbstractAlGaN-based ultraviolet light emitting diodes(UV-LEDs) on AlN/sapphire template were grown by metal organic chemical vapour deposition. The AlN template was characterized by atomic force microscopy and high resolution X-ray diffraction. Atomic force microscopy image shows that the AlN surface is very flat, while high resolution X-ray diffraction results prove the good crystalline quality of the AlN template. A novel structure UV-LED which has several p-AlGaN layers with graded composition is compared with a common structure UV-LED which has a single p-Al0.5Ga0.5N layer. The forward bias voltage at20 mA driving current for the novel structure UV-LED is nearly3 V higher than that of the common structure UV-LED, however, the electroluminescence intensity of the former is over two times higher than that of the latter. The total quantum efficiency of the novel structure UV-LED is more than50% higher than that of the common structure UV-LED. The improvement is considered to be the result of better holes injection efficiency in the novel structure UV-LED.?2011 WILEY-VCH Verlag GmbH& Co. KGaA, Weinheim.
metadata_83中科院半导体照明研发中心
KeywordAtomic Force Microscopy Diffraction Electroluminescence Gallium Metallorganic Chemical Vapor Deposition Organic Chemicals Organic Light Emitting Diodes(Oled) Organometallics Structure(Composition) Ultraviolet Radiation x Ray Diffraction
Subject Area光电子学
Indexed ByEI
Language英语
Date Available2012-06-14
Document Type期刊论文
Identifierhttp://ir.semi.ac.cn/handle/172111/23149
Collection中科院半导体照明研发中心
Corresponding AuthorYan, J.(yanjc@semi.ac.cn)
Recommended Citation
GB/T 7714
Yan, Jianchang,Wang, Junxi,Cong, Peipei,et al. Improved performance of UV-LED by p-AlGaN with graded composition[J]. Physica Status Solidi(C) Current Topics in Solid State Physics,2011,8(2):461-463.
APA Yan, Jianchang.,Wang, Junxi.,Cong, Peipei.,Sun, Lili.,Liu, Naixin.,...&Yan, J..(2011).Improved performance of UV-LED by p-AlGaN with graded composition.Physica Status Solidi(C) Current Topics in Solid State Physics,8(2),461-463.
MLA Yan, Jianchang,et al."Improved performance of UV-LED by p-AlGaN with graded composition".Physica Status Solidi(C) Current Topics in Solid State Physics 8.2(2011):461-463.
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