Results 101 to 110 of about 1,029 (198)

The research on AlGaN-based deep UV MQW LEDs with p-type and thickened last quantum barrier

, 2015
由于发光波长在300nm以下的深紫外发光二极管(DUV-LED)在许多领域存在着应用价值，近年来，基于AlGaN材料的多量子阱DUV-LED已引起了人们越来越多的关注。但不容忽视的是，AlGaN基多量子阱DUV-LED一直面临着包括发光功率较低和内外量子效率较低等问题的困扰。因此，如何提高AlGaN基多量子阱DUV-LED的光电性能是亟待人们探究解决的问题。 本文在对AlGaN基多量子阱DUV-LED的研究中，重点关注了DUV-LED的多量子阱发光有源区的最后一个量子阱势垒（LQB ...
包翔龙
core  

Variation of the external quantum efficiency with temperature and current density in red, blue, and deep ultraviolet light-emitting diodes

, 2018
The temperature-dependent external quantum efficiencies (EQEs) were investigated for a 620 nm AlGaInP red light-emitting diodes (LEDs), a 450 nm GaInN blue LED, and a 285 nm AlGaN deep-ultraviolet (DUV) LED.
Kim, JK, Kim, J, Lee, J, Park, JH, Kim, YI, Schubert, EF, Lee, JW, Park, Y, Kim, DY, Cho, J   +9 more
core   +1 more source

Simulation of AlGaN-based DUV-LED with The Variation of Step Al-graded QWs Configuration

Science Letters
Analysis of aluminum composition grading is presented to enhance the efficiency of AlGaN-based deep ultraviolet light emitting diodes (DUV-LEDs).  The optical performance of LEDs with varying quantum well (QW) thickness and aluminum composition grading were examined through drift-diffusion simulations.
Wan Nur Amierha Wan Ibrahim, Faris Azim Ahmad Fajri, Mohammad Amirul Hairol Aman, Ahmad Fakhrurrazi Ahmad Noorden   +3 more
openaire   +1 more source

Efects of electron blocking layer thickness on the electrical and optical properties of AlGaN based deep ultraviolet light emitting diode

The aluminum gallium nitride (AlGaN)-based deep-ultraviolet light-emitting diode (DUV-LED) has been a prominent device due to its contribution in various fields.
Hairol Aman, Mohammad Amirul, Ahmad Noorden, Ahmad Fakhrurrazi, Abdul Kadir@Jaafar, Muhammad Zamzuri, Daud, Suzairi, Danial, Wan Hazman   +4 more
core   +1 more source

2.3-μm deep UV micro-LEDs fabricated by self-aligned selective thermal oxidation process

Recently, techniques for fabricating micro-sized deep ultraviolet light-emitting diodes (DUV LEDs) have been gaining attention. In this work, we propose a selective thermal oxidation (STO) process to fabricate ultra-small DUV micro-LEDs.
Cortez, Patsy A. Miranda, Ren, Kexin, Li, Xiaohang, Liu, Zhiyuan, Tang, Xiao, Jiang, Zixian, Pan, Zuojian, Lu, Yi, Liu, Tingang, Xiao, Na, Cao, Haicheng   +10 more
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AlGaN-Based Deep-Ultraviolet Light Emitting Diodes Fabricated on AlN/sapphire Template

, 2009
We report on the growth and fabrication of deep ultraviolet (DUV) light emitting diodes (LEDs) on an AlN template which was grown on a pulsed atomic-layer epitaxial buffer layer. Threading dislocation densities in the AlN layer are greatly decreased with
Kang, J. Y., Zhang, Y. Z., Qin,ZX, Fang,H, Li,SP, Yang,ZJ, Sang, L. W., 李书平, Sang,LW, Yang, W. H., 康俊勇, Kang,JY, Li,T, Xu,ZY, Liu,DY, Chen, H. Y., Li, T., Zhang,GY, Fang, H., Zhang, G. Y., Li, S. P., Yang,WH, Chen,HY, Zhang,YZ, Xu, Z. Y., Yang, Z. J., Liu, D. Y., Shen, B., Qin, Z. X., Shen,B   +29 more
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Monolithic integration of deep ultraviolet and visible light-emitting diodes for radiative sterilization application

The demand for effective sterilization methods, particularly in the wake of the Covid-19 pandemic, has sparked interest in the use of deep ultraviolet (DUV) radiation for disinfection.
Li, Xiaohang, Yan, Jianchang, Liu, Zhiyuan, Guo, Yanan, Lu, Yi, Li, Jinmin, Wang, Junxi   +6 more
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Monte carlo analysis of multicolour LED light engine

, 2015
A new Monte Carlo simulation as a tool for analysing colour feedback systems is presented here to analyse the colour uncertainties and achievable stability in a multicolour dynamic LED system.
Chakrabarti, Maumita, Thorseth, Anders, Jepsen, Jørgen, Dam-Hansen, Carsten   +3 more
core  

An integrated wireless deep-UV sensing system for intelligent early fire detection. [PDF]

Sci Adv
Park T, Oh J, Cho J, Kang S, Gasparini N, Song W, Hur J, Bae G, Oh S, Yoo H.   +9 more
europepmc   +1 more source

III-Nitrides empower miniaturized spectral imager in ultraviolet. [PDF]

Light Sci Appl
Zhao Y, Li T, Ooi B.
europepmc   +1 more source