 |
 |
|
Lee, C.-W., Renaud, C., Hsu, C.-S. & Nguyen, T.-P. (2008) Traps and performance of MEH-PPV/CdSe(ZnS) nanocomposite-based organic light-emitting diodes. Nanotechnology, 19 455202.
Added by: Laurent Cournède (2016-03-10 21:58:40) |
| Type de référence: Article DOI: 10.1088/0957-4484/19/45/455202 Numéro d'identification (ISBN etc.): 0957-4484 Clé BibTeX: Lee2008 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: cdse quantum dots, conjugated polymers, core/shell nanocrystals, devices, electroluminescence, meh-ppv, nanoparticles, photoinduced charge-transfer, solar-cells, transient spectroscopy Créateurs: Hsu, Lee, Nguyen, Renaud Collection: Nanotechnology |
Consultations : 1/519
Indice de consultation : 3% Indice de popularité : 0.75% |
| Résumé |
|
We report the fabrication and investigations of organic light-emitting diodes (OLEDs) using a composite made by mixing poly[2-methoxy-5(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) with CdSe/ZnS core/shell quantum dots (QDs). The electroluminescence efficiency of the studied devices was found to be improved as compared to devices using MEH-PPV. Moreover, the current density decreased with increasing QD concentration. We checked the effects of QDs on the electrical transport by determining the trap states, making use of the charge-based deep level transient spectroscopy (Q-DLTS) technique. The most striking result obtained is the decrease in trap density when adding QDs to the MEH-PPV polymer film. These results suggest that QDs would heal defects in nanocomposite-based devices and that CdSe/ZnS QDs prevent the trap center formation.
Added by: Laurent Cournède |