AlGaN‐based ultraviolet light‐emitting diodes: challenges and opportunities,Luminescence

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AlGaN‐based ultraviolet light‐emitting diodes: challenges and opportunities
Luminescence ( IF 3.2 ) Pub Date : 2020-10-19 , DOI: 10.1002/bio.3965
Muhammad Usman ₁ , Shahzeb Malik ₁ , Munaza Munsif ₁

Affiliation

Due to low power consumption, tunable wavelength and long lifetime ultraviolet light‐emitting diodes (UV LEDs) have found many applications in different fields such as health care, water disinfection, agriculture. In this review, we report different problems that lead to low external quantum efficiency of UV LEDs. We also report various challenges in the growth process of the UV LEDs such as increase in the dislocation density, which affects the optoelectronic performance of the devices. We also report the analysis of the two modes of light polarization, i.e. transverse electric and transverse magnetic in UV LEDs. Moreover, we also summarize various state‐of‐the‐art reported external quantum efficiencies, light output power and peak emission wavelengths in the three UV wavelength regimes, i.e. UV‐A, UV‐B and UV‐C LEDs.

中文翻译：

基于AlGaN的紫外线发光二极管：挑战与机遇

由于低功耗，波长可调且使用寿命长的紫外发光二极管（UV LED）已在医疗，水消毒，农业等不同领域中获得了许多应用。在这篇评论中，我们报告了导致UV LED外部量子效率低的不同问题。我们还报告了UV LED增长过程中的各种挑战，例如位错密度的增加，这会影响器件的光电性能。我们还报告了对光偏振的两种模式的分析，即UV LED中的横向电和横向磁。此外，我们还总结了三种最新的外部量子效率，在三种UV波长范围（即UV-A，UV-B和UV-C LED）中的光输出功率和峰值发射波长。

更新日期：2020-10-19

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