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1.山西中科潞安紫外光电科技有限公司, 山西 长治 046000
2.中国科学院半导体研究所 半导体照明技术研究开发中心, 北京 100083
[ "王雪(1991-),女,山西长治人,硕士,工程师,2017年于陕西科技大学获得硕士学位,主要从事芯片设计与开发研究。 E-mail: wangxue@luan-uv.cn" ]
纸质出版日期:2023-05-05,
收稿日期:2022-11-07,
修回日期:2022-11-25,
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王雪,刘乃鑫,王兵等.AlGaN基深紫外LED的NiAu透明电极及其接触特性[J].发光学报,2023,44(05):898-903.
WANG Xue,LIU Naixin,WANG Bing,et al.Ohmic Contact Characteristics of AlGaN-based Deep-ultraviolet Light-emitting-diodes with NiAu Transparent Electrode[J].Chinese Journal of Luminescence,2023,44(05):898-903.
王雪,刘乃鑫,王兵等.AlGaN基深紫外LED的NiAu透明电极及其接触特性[J].发光学报,2023,44(05):898-903. DOI: 10.37188/CJL.20220385.
WANG Xue,LIU Naixin,WANG Bing,et al.Ohmic Contact Characteristics of AlGaN-based Deep-ultraviolet Light-emitting-diodes with NiAu Transparent Electrode[J].Chinese Journal of Luminescence,2023,44(05):898-903. DOI: 10.37188/CJL.20220385.
在p⁃AlGaN表面沉积Ni/Au/Ni/Au透明电极体系,通过传输线模型测试,研究了退火温度对Ni/Au/Ni/Au与p⁃AlGaN材料接触特性的影响。结果表明,AlGaN基深紫外LED采用Ni/Au/Ni/Au金属体系,在600 ℃空气氛围下退火3 min形成p型半导体材料NiO。进一步优化Ni/Au/Ni/Au体系金属厚度,当Ni/Au/Ni/Au各层厚度由20/20/20/20 nm减薄至2/2/5/5 nm,并在600 ℃空气氛围退火3 min,其与p⁃AlGaN材料的接触电阻率从3.23×10
-1
Ω·cm
2
降到2.58×10
-4
Ω·cm
2
。采用上述优化的Ni/Au/Ni/Au体系制备的深紫外LED器件,器件光电特性得到了改善。在150 mA驱动下工作电压低至5.8 V;通过提升电极透过率,光输出功率提升18.9%。
A Ni/Au/Ni/Au transparent electrode system was deposited on the surface of p-AlGaN, and the effects of annealing temperature on the contact characteristics of Ni/Au/Ni/Au with p-AlGaN were studied by transmission line model. When the AlGaN-based deep ultraviolet LED adopted Ni/Au/Ni/Au metal system, meanwhile annealed at 600 ℃ for 3 min, the results show that p-type semiconductor material NiO can be formed in the contact interface. The metal thickness of Ni/Au/Ni/Au system was further optimized. When the Ni/Au/Ni/Au layers were thinned from 20/20/20/20 nm to 2/2/5/5 nm,with the annealing condition at 600 ℃ for 3 min, the specific contact resistivity decreased from 3.23×10
-1
Ω·cm
2
to 2.58×10
-4
Ω·cm
2
. Using the above optimized Ni/Au/Ni/Au system into LED chip process, the photoelectric characteristics of the LED device can be improved drastically. The operating voltage was reduced to 5.8 V at 150 mA, as the increase of the electrode transmittance, the optical output power was increased by 18.9% at the same current.
UV-LEDAlGaNNiAu欧姆接触
UV-LEDAlGaN, NiAuOhmic contact
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