Efficient blue light-emitting diodes based on a classical "push-pull" architecture molecule 4,4 prime -di-(2-(2,5- dimethoxyphenyl)ethenyl)-2,2 prime -bipyridine

A novel, highly blue luminescent molecule containing donor and acceptor groups, 4,4 prime -di-(2-(2,5-dimethoxyphenyl)ethenyl)-2,2 prime -bipyridine, that shows photoluminescence emission at 450 nm with 43% quantum yield is designed and synthesized. Time dependent-DFT calculations show an excellent correlation between theoretical and experimental absorption spectra, thus allowing for a detailed description of the electronic structure and assignment of the main absorption features. An optimized organic light-emitting diode based on a 4,4 prime -di-(2-(2,5-dimethoxyphenyl)ethenyl)-2,2 prime -bipyridine blue emitting layer, with a 4,4 prime ,4 double prime -tris(carbazol-9-yl)-triphenylamine) hole transporting layer, a 2,9-dimethyl-4.7-diphenyl-phenatroline hole blocking layer, and a tris(8-hydroxyquinoline)aluminium electron transport layer exhibited 2.1% quantum efficiency. This journal is © The Royal Society of Chemistry.


Published in:
Journal of Materials Chemistry, 16, 46, 4468
Year:
2006
Publisher:
Royal Society of Chemistry, Cambridge, CB4 OWF, United Kingdom
Keywords:
Note:
Compilation and indexing terms, Copyright 2006 Elsevier Inc. All rights reserved
064810274485
0959-9428
Blue luminescent molecules
Quantum yields
Hole transporting layers
Electron transport
Laboratories:




 Record created 2007-04-03, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)