发光学报2025，Vol.46Issue(4)：553-564,12.DOI:10.37188/CJL.20240321
用于高效光提取的深紫外LED封装体设计与优化
Design and Optimization of Highly Efficient Light Extraction Encapsulation for Deep Ultraviolet LEDs
摘要
Abstract
To face the challenge of low light extraction in AlGaN-based deep ultraviolet(DUV)LEDs,a quartz lens encapsulation structure bonded with fluorine resin was designed to effectively resolve the significant internal total reflection(ITR)losses when photons emitted from the sapphire substrate of the flip-chip LED.This work demonstrated that the thin interfacial fluorine resin bonding layer could form a matched refractive index transition layer,maximizing light extraction.For typical 250 nm DUV LEDs,28％light output intensity could be enhanced.Additionally,a ceramic packaging substrate with reflective sidewalls was designed to improve the extraction and convergence of transverse magnetic(TM)-mode emission from the DUV LEDs.Simulation results indicated signifi-cant improvements across different wavelengths of DUV LEDs.Compared to the reference sample(＜50％forward light output efficiency),the design of reflective packaging substrates could raise the efficiency to 94％.The effi-ciency enhancement was more significant for LEDs with ≤250 nm wavelengths,caused by the higher proportion of TM-mode emission.Further optimization of the quartz lens curvature was able to effectively manipulate the emis-sion convergence characteristics for LEDs,which meet the light field distribution requirements for various applica-tions such as surface disinfection.关键词
AlGaN/深紫外LED/光提取/封装结构Key words
AlGaN/deep ultraviolet LEDs/light extraction/encapsulation structure分类
电子信息工程引用本文复制引用
康闻宇,尹君,黄家新,项磊磊,康俊勇..用于高效光提取的深紫外LED封装体设计与优化[J].发光学报,2025,46(4):553-564,12.基金项目
国家重点研发计划(2022YFB3605103) （2022YFB3605103）
国家自然科学基金(62234001)Supported by National Key Research and Development Program of China(2022YFB3605103) （62234001）
National Natural Science Foun-dation of China(62234001) （62234001）
