中国半导体行业协会封装分会会刊

中国电子学会电子制造与封装技术分会会刊

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电子与封装 ›› 2018, Vol. 18 ›› Issue (1): 39 -42. doi: 10.16257/j.cnki.1681-1070.2018.0010

• 微电子制造与可靠性 • 上一篇    下一篇

大功率白光LED伏安特性和正向电压温度特性研究

杨亭,严启荣,田世锋   

  1. 广东省理工职业技术学校,广州 510500
  • 收稿日期:2017-09-04 出版日期:2018-01-20 发布日期:2018-01-20
  • 作者简介:杨亭(1973—),男,湖南长沙人,硕士研究生,高级讲师,主要研究方向为电子、光电器件制造。

Research of the Current-Voltage Characteristic and the Temperature Characteristic of the Forward Voltage of GaN Based High-Power White LEDs

YANG Ting,YAN Qirong,TIAN Shifeng   

  1. Guangdong Vocational school of polytechnic,Guangzhou 510500,China
  • Received:2017-09-04 Online:2018-01-20 Published:2018-01-20

摘要: 在GaN基大功率白光发光二极管(LED)老化过程中,有部分器件在小电流驱动下出现亮度不一致的现象,对其伏安特性和正向电压温度特性进行了研究。实验结果发现在小电流驱动下发光微弱的LED漏电流严重增大,在高温和大电流驱动的情况下LED正向电压随温度的变化偏离了线性关系,正向电压随温度的变化系数由负数变为正数。同时,通过对比实验表明这种器件出现的反常现象会伴随着寿命和可靠性问题。

关键词: 伏安特性, 正向电压, 温度系数, 漏电流

Abstract: In the aging process of the GaN based high-power white light-emitting diodes(LEDs),the brightness of some LEDs is inconsistent at the low injection current,and the current-voltage characteristic and the temperature characteristic of the forward voltage of GaN based high-power white LEDs are studied.The experimentalresultsshow thatthe dimmestLED leakage current increases seriously at the low injection current.In the case of high temperature and high injection current,the forward voltage of LED deviates linearly with the increase of temperature,and the temperature coefficient changes from negative to positive.By comparing the result of another group LEDs with the same package epoxy,it's find that the appearance of this abnormal phenomenon ofthisdevice willbe accompanied by problemsoflife and reliability.

Key words: the current-voltage characteristic, forward voltage, temperature coefficient, leakage current

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