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Proceedings Paper

Light-emitting devices made of Langmuir-Blodgett-deposited poly(3-hexadecylthiophene)
Author(s): Antonio Vaz Cavalcanti; Clecio Gomes dos Santos; Celso Pinto de Melo
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Paper Abstract

Organic LEDs are a promising class of optoelectronic devices which have advantages of cost, manipulation and emission spectrum over existing options in the market. The key to these advantages is the organic nature of the active layer prepared by the adequate deposition of a conjugated polymer. In this communication we present preliminary results of the preparation and characterization steps of a LED consisting of an ITO covered glass substrate as the anode, an active layer of poly(3-hexadecylthiophene) (P3HDT) and an evaporated aluminum layer as the cathode. Using the Langmuir-Blodgett technique, 20 organized monomolecular layers were transferred from a mixed Langmuir film of P3HDT and behenic acid. The devices were submitted to current- voltage and luminance-current test. Some of them have shown rectifying characteristics and luminance of about 1 cd/m2 at 25 volts and 4 mA. While the production yield was of the order of 25 percent, almost every device tested has shown rectifying characteristics.

Paper Details

Date Published: 22 June 1998
PDF: 0 pages
Proc. SPIE 3419, Optoelectronic Materials and Devices, 341917 (22 June 1998); doi: 10.1117/12.311029
Show Author Affiliations
Antonio Vaz Cavalcanti, Univ. Federal de Pernambuco (Brazil)
Clecio Gomes dos Santos, Univ. Federal de Pernambuco (Brazil)
Celso Pinto de Melo, Univ. Federal de Pernambuco (Brazil)

Published in SPIE Proceedings Vol. 3419:
Optoelectronic Materials and Devices
Marek Osinski; Yan-Kuin Su, Editor(s)

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