Enhanced efficiency of deep ultraviolet light-emitting diodes utilizing full-coverage Al reflector and highly reflective Ni/Rh p-electrode

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-11 DOI:10.1088/1361-6641/ad3a92

Zhenxing Lv, Zhefu Liao, Shengjun Zhou

引用次数: 0

Abstract

Increasing the reflection of p-side is an effective way to improve the optoelectronic performance of flip-chip light-emitting diodes (FCLEDs). Here, we propose a full-coverage Al reflector (FAR) and a highly reflective Ni/Rh p-electrode to enhance the performance of deep ultraviolet (DUV) FCLEDs. The physical mechanism for the impact of the FAR and Ni/Rh electrode on the light extraction efficiency (LEE) is discussed theoretically. Simulations demonstrate that the combination of the FAR and Ni/Rh electrode improves the LEEs of transverse electric- and transverse magnetic-polarized light by 13.62% and 27.08%, respectively. At an injection current of 100 mA, the fabricated DUV FCLEDs with FAR and Ni/Rh electrode exhibits an external quantum efficiency of 4.01% and a wall plugging efficiency of 2.92%, which are 16.85% and 13.18% higher than those of conventional DUV FCLEDs, respectively. These results support the promise of the FAR and Ni/Rh electrode for high-power DUV LED applications.

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利用全覆盖铝反射器和高反射镍/铑对电极提高深紫外发光二极管的效率

提高 p 面的反射率是改善倒装芯片发光二极管（FCLED）光电性能的有效方法。在此，我们提出了一种全覆盖铝反射器（FAR）和一种高反射镍/铑对电极，以提高深紫外（DUV）FCLED 的性能。理论上讨论了 FAR 和 Ni/Rh 电极对光萃取效率（LEE）影响的物理机制。模拟结果表明，结合使用 FAR 和 Ni/Rh 电极，横向电偏振光和横向磁偏振光的萃取效率分别提高了 13.62% 和 27.08%。在注入电流为 100 mA 时，使用 FAR 和 Ni/Rh 电极制造的 DUV FCLED 的外部量子效率为 4.01%，堵壁效率为 2.92%，分别比传统 DUV FCLED 高出 16.85% 和 13.18%。这些结果支持了 FAR 和 Ni/Rh 电极在高功率 DUV LED 应用中的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.