Can an organic phosphorescent dye act as a charge transporter?

被引：17

作者：

Choi, W. H.

Cheung, C. H.

So, S. K. ^{[1
]}

机构：

[1] Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 05期

关键词：

Organic light-emitting diodes; Phosphorescent dye; Thin film transistor; Charge transport; THIN-FILMS; DEVICES;

D O I：

10.1016/j.orgel.2010.02.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hole transport property of a widely used phosphorescent dye, tris(2-phenylpyridine) iridium or Ir(ppy)(3) was investigated by thin film transistor (TFT) technique. The field effect (FE) mobility of Ir(ppy)(3) was found to be 1.7 x 10 (5) cm(2) V (1)s (1). This value is actually comparable to NPB and CBP, two popular hole transporting materials for fluorescent and phosphorescent organic light-emitting diodes (FOLED and POLED), respectively. In addition, temperature dependent measurements were carried out to study the energetic disorder (sigma) of Ir(ppy)(3). The extracted sigma similar to 88 meV is comparable to those of other common amorphous organic hole transporters, which are in the range of 80-90 meV. Our findings indicate that the dye can directly act as a hole transporting component in POLEDs. Crown Copyright (C) 2010 Published by Elsevier B. V. All rights reserved.

引用

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页码：872 / 875

页数：4

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