Measurement of The Electron Mobility of Tris(8-quinolinolato) Aluminum Driven by Square Waves

CHEN Lei; LI Gui-fang; CHEN Yu-huan; WANG Ming-xia; YAN Dong-hang; ZHANG Ji-dong; QIN Da-s

doi:10.3788/fgxb20123309.0954

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Measurement of The Electron Mobility of Tris(8-quinolinolato) Aluminum Driven by Square Waves

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- Measurement of The Electron Mobility of Tris(8-quinolinolato) Aluminum Driven by Square Waves
- Chinese Journal of Luminescence Vol. 33, Issue 9, Pages: 954-959(2012)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123309.0954
  CLC： TN873.3;TN383+.1
- Received：12 June 2012，
  
  Revised：24 June 2012，
  
  Published：10 September 2012
- 稿件说明：
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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.

摘要

在非正弦波(方波)的驱动下

观察到了OLED中Alq

的电致发光现象。在高段方波驱动下

Alq

中的电子向阳极移动;在低段方波驱动下

Alq

中的电子向阴极移动。当方波的周期是电子穿过Alq

中所用时间的2倍时

Alq

中的电致发光现象完全消失。由此

可以计算出Alq

中的电子迁移率

得到的结果和文献的报道值相吻合。对Alq

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。

Abstract

The electroluminescence of tris(8-quinolinolato) aluminum (Alq

) 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

are driven towards the anode

while moved towards the cathode during the following low period of square wave. The electroluminescence of Alq

vanishes completely from the point where the period of square wave equals twice the transit time of electrons across the Alq

layer. Thus

the electron mobility of Alq

can be evaluated

and the obtained results are in good accordance with the reported values. The thickness dependence of the electron mobility for Alq

is also investigated. We provide a simple

easily accessible method to determine the charge-carrier mobility for organic materials.

关键词

Keywords

references

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