周期性椭球结构薄膜倒装LED光提取效率的研究

系统仿真学报 ›› 2016, Vol. 28 ›› Issue (2): 369-375.

周期性椭球结构薄膜倒装LED光提取效率的研究

于晓杰, 李康, 孔凡敏, 岳庆炀

山东大学信息科学与工程学院,山东济南 250100

收稿日期:2014-09-23 修回日期:2014-12-30 出版日期:2016-02-08 发布日期:2020-08-17
作者简介:于晓杰(1987-),男,山东威海,硕士,研究方向为计算电磁学;李康(1962-),男,山东济南,博士,教授,研究方向为微波仿真技术。
基金资助:
国家自然科学基金项目(61327808,61077043)

Study of Light Extraction Efficiency for Thin-film-flip-chip Light-emitting Diodes with Periodic Spheroids

Yu Xiaojie, Li Kang, Kong Fanmin, Yue Qingyang

School of Information Science and Engineering, Shandong University, Jinan 250100, China

Received:2014-09-23 Revised:2014-12-30 Online:2016-02-08 Published:2020-08-17

摘要/Abstract

摘要： 为提高氮化镓(GaN)基薄膜倒装LED光提取效率,提出一种三角晶格椭球周期结构LED模型,并用三维时域有限差分法(3D-FDTD)分析其结构参数(如椭球的周期和高度)对薄膜倒装LED光提取效率的影响。FDTD数值计算结果证明椭球周期结构可以有效提高薄膜倒装LED光提取效率,同时FDTD仿真分析LED内部能量辐射图样观测到椭球周期结构通过削弱LED内的导模,从而提高其光提取效率,并用严格耦合波方法(RCWA)对其衍射特性进行了仿真分析。研究结果表明优化的椭球周期结构能使薄膜倒装LED光提取效率提高2.8倍。

关键词: 发光二极管, 周期结构, 严格耦合波, 时域有限差分

Abstract: The enhancement of light extraction efficiency for thin-film-flip-chip light-emitting diodes (LED) based gallium nitride (GaN) with triangular lattice periodic ellipsoid was studied. Three dimensional finite difference time domain methods (3D-FDTD) were applied to analyze the structural parameters (the period and ellipsoid height) effects on thin-film-flip-chip LED light extraction efficiency. FDTD numerical results prove that ellipsoids structure can improve LED light extraction efficiency and impair guide mode. Method rigorous coupled wave (RCWA) is adopted to analyze diffraction characteristics. This research results show that optimization of the periodic ellipsoid can improve thin-film-flip-chip LED light extraction efficiency increased by 2.8 times.

Key words: light-emitting diodes, periodic structure, rigorous coupled wave method, finite difference time domain method

中图分类号:

TN312.8

于晓杰, 李康, 孔凡敏, 岳庆炀. 周期性椭球结构薄膜倒装LED光提取效率的研究[J]. 系统仿真学报, 2016, 28(2): 369-375.

Yu Xiaojie, Li Kang, Kong Fanmin, Yue Qingyang. Study of Light Extraction Efficiency for Thin-film-flip-chip Light-emitting Diodes with Periodic Spheroids[J]. Journal of System Simulation, 2016, 28(2): 369-375.

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