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  4. 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
 
research article

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

Berner, D.  
•
Klein, C.
•
Nazeeruddin, Md K.  
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2006
Journal of Materials Chemistry

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.

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Type
research article
DOI
10.1039/b610880f
Web of Science ID

WOS:000242220700002

Author(s)
Berner, D.  
Klein, C.
Nazeeruddin, Md K.  
De Angelis, F.
Castellani, M.  
Bugnon, P.  
Scopelliti, R.
Zuppiroli, L.  
Graetzel, M.  
Date Issued

2006

Publisher

Royal Society of Chemistry

Published in
Journal of Materials Chemistry
Volume

16

Issue

46

Article Number

4468

Subjects

Light emitting diodes

•

Aromatic compounds

•

Photoluminescence

•

Quantum efficiency

•

Synthesis (chemical)

•

Electronic structure

•

Probability density function

•

Blue luminescent molecules

•

Quantum yields

•

Hole transporting layers

•

Electron transport

Note

064810274485

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LOMM  
LPI  
Available on Infoscience
April 3, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/4261
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