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Interchain and intrachain emission branching in polymer light-emitting diode doped by organic molecules
Krautz, D.; Lunedei, E.; Puigdollers i González, Joaquim; Badenes, Gonçal; Alcubilla González, Ramón; Cheylan, Stephanie
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies
A blend of the polymer poly 2- 2-ethylhexyloxy -5-methoxy-1,4-phenylenevinylene MEH-PPV and the electron-transport molecule tris- 8-hydroxyquinoline aluminum Alq3 has been investigated by means of electroluminescence and fluorescence spectroscopy, upon variation of the Alq3 content in the blend.Adecreased interchain emission is observed upon increasing Alq3 content, due to lower packing of the MEH-PPV chains which leads to a reduction in the interchain interaction, excimer formation, and emission probability. A branching of MEH-PPV interchain and intrachain emissive contributions is clearly time resolved and analyzed as a function of the Alq3 content. At high doping concentration, direct emission from Alq3 molecules is observed.
Àrees temàtiques de la UPC::Física
Àrees temàtiques de la UPC::Física::Física molecular::Física de polímers
Àrees temàtiques de la UPC::Enginyeria electrònica::Components electrònics

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