Layered organic film growth by substrate temperature tuning for efficiency-enhanced OLEDs

Effects on resultant organic light-emitting device of substrate temperature during the evaporation process of a light-emitting material are reported. Light-emitting diodes are based on a novel bis-imido-phenylene vinylene (ImPV) derivative as green-emitting molecule. It is reported that the substrat...

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Bibliographic Details
Published in:Organic electronics 2006-02, Vol.7 (1), p.38-44
Main Authors: Wantz, G., Dautel, O.J., Almairac, R., Hirsch, L., Serein-Spirau, F., Vignau, L., Lère-Porte, J.P., Parneix, J.P., Moreau, J.J.E.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical Sciences
Electronics
Exact sciences and technology
Imido-phenylene vinylene
Material chemistry
OLED
Optoelectronic devices
Organic chemistry
Organic vacuum deposition
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Substrate temperature
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Summary:Effects on resultant organic light-emitting device of substrate temperature during the evaporation process of a light-emitting material are reported. Light-emitting diodes are based on a novel bis-imido-phenylene vinylene (ImPV) derivative as green-emitting molecule. It is reported that the substrate temperature has a great influence on the thin film morphology. Heating the substrate results in a more ordered film. Using this technique, molecules of ImPV self-organise in an even layered film with 1.7 nm-thick molecular layers. Devices based on heated substrates exhibit higher operating voltages but enhanced quantum and luminous efficiencies.
ISSN:1566-1199
1878-5530
DOI:10.1016/j.orgel.2005.11.001