Optical Characterization of GaN-Based Vertical Blue Light-Emitting Diodes on P-Type Silicon Substrate

doi:10.3390/cryst10070621

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	Optical Characterization of GaN-Based Vertical Blue Light-Emitting Diodes on P-Type Silicon Substrate
	Y. Lei,H. Wan,B. Tang,S. Y. Lan,J. H. Miao,Z. H. Wan,Y. C. Liu and S. J. Zhou
刊名	Crystals
	2020
卷号	10 期号:7 页码:12
ISSN号	2073-4352
DOI	10.3390/cryst10070621
英文摘要	Fabricating GaN-based light-emitting diodes (LEDs) on a silicon (Si) substrate, which is compatible with the widely employed complementary metal-oxide-semiconductor (CMOS) circuits, is extremely important for next-generation high-performance electroluminescence devices. We conducted a systematic investigation of the optical properties of vertical LEDs, to reveal the impacts of the manufacturing process on their optical characteristics. Here, we fabricated and characterized high-efficiency GaN-based LEDs with integrated surface textures including micro-scale periodic hemispherical dimples and nano-scale random hexagonal pyramids on a 4 inch p-type Si substrate. The highly reflective Ag/TiW metallization scheme was performed to decrease downward-absorbing light. We demonstrated the influence of transferring LED epilayers from a sapphire substrate onto the Si substrate on the emission characteristics of the vertical LEDs. The removal of the sapphire substrate reduced the adverse impacts of the quantum-confined Stark effect (QCSE). The influence of integrated surface textures on the light extraction efficiency (LEE) of the vertical LEDs was studied. With the injection current of 350 mA, vertical LEDs with integrated surface textures demonstrated an excellent light output power of 468.9 mW with an emission peak wavelength of 456 nm. This work contributes to the integration of GaN-based vertical LEDs into Si-based integrated circuits.
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语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/64746]
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	Y. Lei,H. Wan,B. Tang,S. Y. Lan,J. H. Miao,Z. H. Wan,Y. C. Liu and S. J. Zhou. Optical Characterization of GaN-Based Vertical Blue Light-Emitting Diodes on P-Type Silicon Substrate[J]. Crystals,2020,10(7):12.
APA	Y. Lei,H. Wan,B. Tang,S. Y. Lan,J. H. Miao,Z. H. Wan,Y. C. Liu and S. J. Zhou.(2020).Optical Characterization of GaN-Based Vertical Blue Light-Emitting Diodes on P-Type Silicon Substrate.Crystals,10(7),12.
MLA	Y. Lei,H. Wan,B. Tang,S. Y. Lan,J. H. Miao,Z. H. Wan,Y. C. Liu and S. J. Zhou."Optical Characterization of GaN-Based Vertical Blue Light-Emitting Diodes on P-Type Silicon Substrate".Crystals 10.7(2020):12.