A model for the current–voltage characteristics and the quantum efficiency of single-layer organic light emitting diodes
- 8 September 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (10), 1290-1292
- https://doi.org/10.1063/1.119874
Abstract
A model for the current–voltage characteristics and the quantum efficiency of single-layer organic light emitting diodes is presented. With variables such as the electric field, the hole, and electron carrier densities, a set of coupled nonlinear differential equations is derived by using classical electrostatics and by assuming Fowler–Nordheim injection. Numerical calculations for different carrier mobility and barrier height conditions show that low barrier height at both electrodes leads to higher efficiency and higher carrier mobility leads to higher brightness. We find that for applications that require high current injection such as lasers, materials with high mobility are desired to reduce space charge effects.Keywords
This publication has 7 references indexed in Scilit:
- Efficient, fast response light-emitting electrochemical cells: Electroluminescent and solid electrolyte polymers with interpenetrating network morphologyApplied Physics Letters, 1996
- Electron and hole transport in poly(p-phenylene vinylene) devicesApplied Physics Letters, 1996
- Relationship between electroluminescence and current transport in organic heterojunction light-emitting devicesJournal of Applied Physics, 1996
- Single-layer white light-emitting organic electroluminescent devices based on dye-dispersed poly(N-vinylcarbazole)Applied Physics Letters, 1995
- Enhanced performance of polymer light-emitting diodes using high-surface area polyaniline network electrodesJournal of Applied Physics, 1995
- Electroluminescence from single layer molecularly doped polymer filmsPublished by SPIE-Intl Soc Optical Eng ,1993
- Organic electroluminescent diodesApplied Physics Letters, 1987