CHARGE INJECTION AND TRANSPORT IN POLY(P-PHENYLENE VINYLENE) LIGHT-EMITTING-DIODES

被引：43

作者：

MARKS, RN ^{[1
]}

BRADLEY, DDC ^{[1
]}

JACKSON, RW ^{[1
]}

BURN, PL ^{[1
]}

HOLMES, AB ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CHEM LAB,CAMBRIDGE CB2 1EW,ENGLAND

来源：

SYNTHETIC METALS | 1993年 / 57卷 / 01期

关键词：

Light emitting diodes;

D O I：

10.1016/0379-6779(93)90569-I

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the temperature dependence of electroluminescence in poly(p-phenylene vinylene) (PPV) devices in order to study charge injection across the electrode/polymer interfaces. The devices used were made with an indium tin oxide (ITO) hole injecting contact, and either an aluminium, magnesium, or calcium electron injecting contact. The IV curves show two distinct features. There is a thermally activated process at low fields, followed by field emission at high fields, when light is seen. The thermally activated process is frozen out below approximately 200K, and has an activation energy of approximately 0.3eV - 0.4eV. These data suggest that the field emission is that of holes across the ITO/PPV interface. The thermally activated process may be space charge limited conduction, in which case the activation energy measured is that of the charge mobility in the polymer.

引用

页码：4128 / 4133

页数：6

共 9 条

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