不同结构的高功率gan基白光led的劣化行为与可靠性

H. Cao, Jiajia Fu, Lixia Zhao, Xuejiao Sun, Baojuan Sun, Junxi Wang, Jinmin Li
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引用次数: 5

摘要

对不同结构的氮化镓基大功率白光led进行了高应力测试,包括传统的横向、垂直和倒装led。在测试过程中,对每个LED的所有电学、光学和热学性能进行了现场测量。结果表明,对于横向发光二极管,外延层的结构特性仍然是影响其光退化行为的关键因素。在相似的结构性能和泄漏电流下,失效机理相似,激活能相近。此外,垂直和倒装led可以有效地改善散热,特别是在高温下。通过比较不同结构led在不同应力温度下的寿命,可以发现应力温度对可靠性评估起着重要作用。优化后的应力温度有助于更有效地进行可靠性评估。该研究将为未来可控制寿命的LED设计提供指导。对问题或情况的陈述,以及为解决问题所采取的方法Section中的第二段应该以“换行”(使用回车键)开始,但不要添加额外的空行。轻微的缩进将清晰地定义段落,“ECTC文本”样式包括段落之间的轻微间距(1点)。这第一部分也可能包含过去的发展和已经知道的背景,并在其他地方发表的摘要。这最好在你自己的论文中总结,并参考其他包含更广泛讨论这一背景信息的出版物。[1]参考文献放在论文的末尾。[2]记住,你不应该重述在文献档案中现成的材料;简单地总结一下,然后加上一两个参考文献。我们领域的许多同行评议的论文已经发表在IEEE组件和封装技术交易和高级封装上-参见www.cpmt.org/trans/。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Degradation behaviors and reliability of high power GaN-based white LEDs with different structures
Highly stress tests were carried out for GaN-based high power white LEDs with different structures, including traditional lateral, vertical as well as flip-chip LEDs. During the tests, all the electrical, optical and thermal properties were measured in-situ for each LED. The results show that for lateral LEDs, the structure property of LED epitaxial layer is still the key factor that influences the optical degradation behavior. With similar structure properties and leakage current, the failure mechanism will be similar and the activation energy is close to each other. In addition, it is shown that the vertical and flip-chip LEDs can improve the heat dissipation effectively, especially at high temperature. Compared the lifetimes of the LEDs with different structures at different stress temperatures, it can be found that the stress temperature play an important role for reliability evaluation. The optimized stress temperature can help to evaluate the reliability more efficiently. The study will give guidance for the future LED design with controllable lifetime. A statement of the problem or situation, and the approach that is taken to resolve it. The second paragraph in the Section should start with a "line break" (using the enter/return key), but do not add an extra blank line. The slight indent will clearly define the paragraphs, and the "ECTC Text" Style includes a slight spacing (1 point) between paragraphs within the Section. This first Section may also contain a summary of the past developments and background of what is already known, and published elsewhere. This is best summarized in your own paper, with references to other publications containing more-extensive discussions of this background information. [1] The references are placed at the end of the paper. [2] Remember that you should not re-state material that is readily available in the archival literature; simply summarize it, then add a reference or two. Many peer-reviewed papers in our fields have been published in the IEEE Transactions on Components and Packaging Technologies, and on Advanced Packaging — see www.cpmt.org/trans/.
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