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Green OLED's: Electroluminescence and the electrical carrier transport

Published online by Cambridge University Press:  15 February 2011

L. Pereira ,
R. Pontes  and
P. Lopes
L. Pereira
Affiliation:
Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal
R. Pontes
Affiliation:
Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal
P. Lopes
Affiliation:
Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal
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Abstract

Organic Light Emitting Diodes (OLED) based on metal chelate complexes (Alq3) as the emmiting layer has been prepareded and studied in order to characterise their optical and electrical properties. Electrical measurements have been performed in order to establish the nature of carrier transport. The results point to a trap charge-limited conduction (TCL) with characteristic trap energy near 0.13 eV. In electroluminescence a large green band with a maximum at 2.4 eV was found as a result of three overlapping bands that are correlated with the organic layers. The origin of this luminescence spectrum was analysed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 771: Symposium L – Organic and Polymeric Materials and Devices , 2003 , L4.31
Copyright
Copyright © Materials Research Society 2003

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