Investigation of charge-carrier injection characteristics in NPB/Alq3 heterojunction devices

被引：19

作者：

Chen, Jiangshan ^{[1
]}

Ma, Dongge ^{[1
]}

机构：

[1] Chinese Acad Sci, Grad Sch, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

CHEMICAL PHYSICS | 2006年 / 325卷 / 02期

关键词：

charge injection; organic light-emitting diodes; Fowler-Nordheim tunneling; Richardson-Schottky thermionic emission;

D O I：

10.1016/j.chemphys.2005.12.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of copper phthalocyanine (CuPc) and LiF interfacial layers on the charge-carrier injection in NN'-di(naphthalene-l-yl)N,N'-diphenyl-benzidine (NPB)/tris(8-hydroxyquinoline) aluminium (Alq(3)) organic heterojunction devices have been studied through the analysis of current-voltage characteristics. The investigation clearly demonstrated that the hole injection into NPB from anode is Fowler-Nordheim (FN) tunneling and the electron injection into Alq3 from cathode is Richardson-Schottky (RS) thermionic emission. The barrier heights obtained from the FN and RS models proved that the band alignments for charge-carrier injection are greatly improved by the CuPc and LiF interfacial layers, which should fully clarify the role of the interfacial layer on the improvement of device performance. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：225 / 230

页数：6

共 31 条

[1]

Blom PWM, 1998, POLYM ADVAN TECHNOL, V9, P390, DOI 10.1002/(SICI)1099-1581(199807)9:7<390::AID-PAT795>3.0.CO

[2]

2-9

[3] VISIBLE-LIGHT EMISSION FROM SEMICONDUCTING POLYMER DIODES [J].