真空和常规封装下有机发光器件寿命试验

Lifetime test of organic light-emitting device in high vacuum and usual package

对紫外固化环氧树脂封装的商品蓝光有机发光器件进行了打开封装后在高真空(10-5Pa)环境下的寿命实验,同时对未开封的同样器件在大气环境下进行了同样参数的寿命实验。实验结果表明,高真空下未封装器件的加速寿命为1675h,而大气下封装器件的加速寿命为1224h。这一结果表明在高真空环境下,有机发光器件的寿命有明显的提高,这证明了水蒸气和氧气通过紫外固化环氧树脂封装材料的渗透是影响紫外环氧树脂封装有机电致的发光器体(OLED)寿命的重要因素;封装器件内的吸气片不能完全吸收经封装渗透进入器件内的水蒸气和氧气。除了水蒸气和氧气渗透封装的因素外,OLED的寿命过程还存在其他的重要影响因素。

This article introduces two experiments： one is the lifetime test of organic light-emitting device（OLED） packaged by UV cured epoxy resin in a high vacuum environment after being unpackaged,the other is the lifetime test of unpackaged OLED in atmospheric condition using the same parameters.The results of experiments show that the accelerating lifetime of unpackaged OLED in a high vacuum environment is 1 675 h while that of packaged OLED in atmospheric condition is 1 224 h,which indicates that the lifetime of OLED in a high vacuum environment has an obvious improvement.This phenomenon proves that the penetration of water vapor and oxygen through materials packaged by UV cured epoxy resin are significant factors influencing the lifetime of OLED packaged by UV cured epoxy resin.Inspiratory films in OLEDs cannot totally absorb water vapor and oxygen penetrating into the devices.Besides water vapor and oxygen,there are some other important factors influencing the lifetime of OLEDs.