Light-emitting devices made of Langmuir-Blodgett-deposited poly(3-hexadecylthiophene)

Antonio Vaz Cavalcanti; Clecio Gomes dos Santos; Celso Pinto de Melo

doi:10.1117/12.311029

22 June 1998 Light-emitting devices made of Langmuir-Blodgett-deposited poly(3-hexadecylthiophene)

Antonio Vaz Cavalcanti, Clecio Gomes dos Santos, Celso Pinto de Melo

Proceedings Volume 3419, Optoelectronic Materials and Devices; 341917 (1998) https://doi.org/10.1117/12.311029
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

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.

Citation Download Citation

Antonio Vaz Cavalcanti, Clecio Gomes dos Santos, and Celso Pinto de Melo "Light-emitting devices made of Langmuir-Blodgett-deposited poly(3-hexadecylthiophene)", Proc. SPIE 3419, Optoelectronic Materials and Devices, 341917 (22 June 1998); https://doi.org/10.1117/12.311029

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