Ni–Cu Nanoparticles-Embedded Ag-Based Reflector for High-Efficiency Light-Emitting Diodes
| Autor: | Young-Ju Kwon, Kyoung-Kook Kim, Eun-Kyung Chu, Beom-Rae Noh, Kab Ha, Junhwan Jang, Soohaeng Cho, Semi Oh, Jaehyuk Im |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Annealing (metallurgy) Schottky barrier Contact resistance Biomedical Engineering Nanoparticle Bioengineering General Chemistry Condensed Matter Physics law.invention Wavelength law Optoelectronics General Materials Science Thermal stability business Diode Light-emitting diode |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 20:6732-6737 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2020.18800 |
| Popis: | We investigated the use of a silver reflector embedded with Ni–Cu nanoparticles to achieve low resistance and high reflectivity in GaN-based flip-chip light-emitting diodes. Compared to a single layer of Ag, the NC-NPs/Ag reflector exhibits a higher light reflectance of ~90% at a wavelength of 450 nm, a lower contact resistance of 4.75 × 10−5 II cm2, and improved thermal stability after annealing at 400°C. The NC-NPs formed after the annealing process prevents agglomeration of the Ag layer, while also reducing the Schottky barrier height between the p-GaN layer and metal reflector. The LED fabricated with a NC-NPs/Ag reflector exhibited a forward-bias voltage of 3.13 V and an improvement in light output power of 36.6% (at 20 mA), when compared with the LED composed of a Ag SL. This result indicates that the NC-NPs/Ag reflector is a promising p-type reflector for high-intensity light-emitting diodes. |
| Databáze: | OpenAIRE |
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