109 research outputs found
“Investigation on the thickness dependence of the electrical characteristics of a monolayer polymeric LED” - PRESENTING AUTHOR
No full textGestion de l'espace rural, des pratiques aux modèles (Éditorial)
No full textDeffontaines Jean-Pierre, Cheylan Jean-Paul, Lardon Sylvie. Gestion de l’espace rural, des pratiques aux modèles (Éditorial). In: Mappemonde, 1990/4. Gestion de l’espace rural, des pratiques aux modèles. p. 1
Les chorèmes: un outil pour l'étude de l'activité agricole dans l'espace rural
Get PDFDeffontaines Jean-Pierre, Cheylan Jean-Paul, Lardon Sylvie, Théry Hervé. Les chorèmes: un outil pour l’étude de l’activité agricole dans l’espace rural. In: Mappemonde, 1990/4. Gestion de l’espace rural, des pratiques aux modèles. pp. 2-4
“Single layer organic light emitting diode based on a thiophene polymer with a cyano group” - PRESENTING AUTHOR
No full text
Optical gain in conjugated polymer hybrid structures based on porous silicon waveguides
No full textThe fabrication and optical characterization of a hybrid waveguide formed by a MDMO-PPV semiconductor layer deposited on a porous silicon cladding is reported. Evidence of amplified spontaneous emission is observed when the intensity of the excitation pump pulses is higher than a certain threshold. A net gain coefficient of about 50 ± 8 cm-1 is estimated, which is similar to those reported for other PPV derivate conjugated polymers. The demonstration of positive optical gain in these hetero-structures is very promising because new photonic structures could be envisaged due to the versatility of the porous silicon cladding
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