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1. 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,吉林 长春,130022
2. 河北工业大学 化工学院 天津,300130
纸质出版日期:2012-9-10,
收稿日期:2012-6-12,
修回日期:2012-6-24,
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陈磊, 李贵芳, 陈玉焕, 王明霞, 闫东航, 张吉东, 秦大山. 方波驱动法测定Alq<sub>3</sub>的电子迁移率[J]. 发光学报, 2012,33(9): 954-959
CHEN Lei, LI Gui-fang, CHEN Yu-huan, WANG Ming-xia, YAN Dong-hang, ZHANG Ji-dong, QIN Da-shan. Measurement of The Electron Mobility of Tris(8-quinolinolato) Aluminum Driven by Square Waves[J]. Chinese Journal of Luminescence, 2012,33(9): 954-959
陈磊, 李贵芳, 陈玉焕, 王明霞, 闫东航, 张吉东, 秦大山. 方波驱动法测定Alq<sub>3</sub>的电子迁移率[J]. 发光学报, 2012,33(9): 954-959 DOI: 10.3788/fgxb20123309.0954.
CHEN Lei, LI Gui-fang, CHEN Yu-huan, WANG Ming-xia, YAN Dong-hang, ZHANG Ji-dong, QIN Da-shan. Measurement of The Electron Mobility of Tris(8-quinolinolato) Aluminum Driven by Square Waves[J]. Chinese Journal of Luminescence, 2012,33(9): 954-959 DOI: 10.3788/fgxb20123309.0954.
在非正弦波(方波)的驱动下
观察到了OLED中Alq
3
的电致发光现象。在高段方波驱动下
Alq
3
中的电子向阳极移动;在低段方波驱动下
Alq
3
中的电子向阴极移动。当方波的周期是电子穿过Alq
3
中所用时间的2倍时
Alq
3
中的电致发光现象完全消失。由此
可以计算出Alq
3
中的电子迁移率
得到的结果和文献的报道值相吻合。对Alq
3
中电子迁移率和厚度的关系进行了研究
从而提出了一种简单易行的计算有机材料的电子迁移率的方法。
The electroluminescence of tris(8-quinolinolato) aluminum (Alq
3
) has been observed in organic light emitting diodes under a kind of non-sinusoidal waveform (a square wave). During the high period of square wave
the electrons in Alq
3
are driven towards the anode
while moved towards the cathode during the following low period of square wave. The electroluminescence of Alq
3
vanishes completely from the point where the period of square wave equals twice the transit time of electrons across the Alq
3
layer. Thus
the electron mobility of Alq
3
can be evaluated
and the obtained results are in good accordance with the reported values. The thickness dependence of the electron mobility for Alq
3
is also investigated. We provide a simple
easily accessible method to determine the charge-carrier mobility for organic materials.
方波驱动迁移率Alq3p型掺杂
square wave drivingmobilitytris(8-quinolinolato) aluminump-type doping
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