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
Numéro d'identification (ISBN etc.): 0957-4484
Clé BibTeX: Lee2008
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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
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Indice de consultation : 2%
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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