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不久前,我们报导了以TPD为空穴传输层,Alq为电子传输兼发光层的双层薄膜电致发光器件,在定电流密度6mA/cm~2连续驱动下,初始亮度106cd/m~2下降至一半亮度的时间为120小时,而继续操作500小时,亮度仍有38cd/m~2。在这篇文章中,我们将报道一个在上述器件的空穴传输层TPD中掺杂而构成的新器件。这个新器件发光亮度和效率比原器件增加了50％,而稳定性增加了近10倍,初始亮度165cd/m~2的半亮度寿命达1200小时。
Not long ago, we reported a double-layer thin-film electroluminescent device that uses TPD as the hole transport layer and Alq as the electron transport and luminescent layer at an initial luminance of 106 cd / m ~ 2 at a constant current density of 6 mA / cm ~ 2 Half the time dropped to 120 hours, while continuing to operate 500 hours, the brightness is still 38cd / m ~ 2. In this article we will report on a new device made by doping the hole transport layer TPD of the above device. The brightness and efficiency of the new device increased by 50% compared with the original device, while the stability increased by nearly 10 times, the initial brightness of 165cd / m ~ 2 half-brightness life of 1200 hours.