蓝宝石衬底GaN基白光LED静电老化特性

Influence of ESD on aging of GaN/Al2O3 white LEDs

  • 摘要: 本文对几组蓝宝石衬底GaN基白光二极管(LED)施加了1000V静电击打后,对未失效的LED分别采用30、50和70mA的驱动电流进行老化实验,研究对比了1000V的静电对蓝宝石衬底GaN基白光LED老化寿命的影响,并对相关实验现象进行了分析。通过计算得出:直接老化和施加1000V静电后再老化,蓝宝石衬底GaN基白光LED的寿命分别为460和446小时,其结果表明在1000V范围内施加不同的静电对未失效的LED寿命没有明显的影响,但静电后失效的LED会产生漏电和光输出功率明显降低现象。

     

    Abstract: The current accelerated aging experiments have been performed to the work GaN/Al2O3 white LEDS after ESD stressed at voltage 1000V.The influence of electrostatic stress on no failure GaN/Al2O3 white LEDs and the comparison of characteristic parameters at different driven current aging have also been researched.It is calculated that aging of GaN/ Al2O3 white LEDS for raw and carring ESD 1000V are 460h and 446h respectively.The results show that the electrostatics stress has little influence on aging of GaN/Al2O3 white LEDs when the ESD voltage is less than 1000V.The fail LEDs will produce leakage current and degradation of light output

     

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