Document Detail

Traps and performance of MEH-PPV/CdSe(ZnS) nanocomposite-based organic light-emitting diodes.
MedLine Citation:
PMID:  21832764     Owner:  NLM     Status:  In-Data-Review    
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.
Chih-Wen Lee; Cedric Renaud; Chain-Shu Hsu; Thien-Phap Nguyen
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Publication Detail:
Type:  Journal Article     Date:  2008-10-08
Journal Detail:
Title:  Nanotechnology     Volume:  19     ISSN:  0957-4484     ISO Abbreviation:  Nanotechnology     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2011-08-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  455202     Citation Subset:  -    
Institut des Matériaux Jean Rouxel, Université de Nantes-CNRS, 2 rue de la Houssinière, BP32229, 44322 Nantes, France. Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan.
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