LED电极结构优化设计与仿真计算
发布时间:2018-05-19 18:54
本文选题:发光二极管 + 电极结构 ; 参考:《半导体光电》2017年04期
【摘要】:LED电极结构极大地影响着LED芯片的电流扩展能力,优化电极结构,能够缓解电流拥挤现象。讨论了正装LED结构和倒装LED结构的电流分布模型,并通过SimuLED软件研究了电极结构对LED电流扩展能力的影响。仿真结果表明:采用插指型电极结构极大提高了正装LED的电流扩展能力,电极下方插入电流阻挡层(CBL)后改变了芯片的电流分布状况,有利于光效的提升;而倒装LED的通孔式双层金属电极结构利用两层金属的互联作用,使n电极能够在整个芯片范围内均匀分布,进一步提高了电流扩展性能。
[Abstract]:The structure of LED electrode greatly affects the current expansion ability of LED chip, and the optimization of electrode structure can alleviate the phenomenon of current congestion. The current distribution models of LED structure and inverted LED structure are discussed, and the effect of electrode structure on the current expansion ability of LED is studied by SimuLED software. The simulation results show that the current spreading ability of the full-mounted LED is greatly improved by using the inserted electrode structure, and the current distribution of the chip is changed after the insertion of the current barrier layer under the electrode, which is beneficial to the improvement of the light efficiency. However, the through hole bilayer metal electrode structure with inverted LED makes use of the interaction of two layers of metal to make the n electrode distribute uniformly throughout the chip, thus further improving the current spread performance.
【作者单位】: 武汉大学动力与机械学院;
【基金】:国家自然科学基金项目(重大项目U1501241) 国家“863”计划项目(2015AA03A101)
【分类号】:TN312.8
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