Molecular engineering to improve the charge carrier balance in single-layer silole-based OLEDs

We report a molecular engineering study on optical, structural and electrical properties of seven silole derivates aimed at enhancing the charge carrier balance in single-layer devices. By functionalizing two hole-transporting groups, dipyridylamine and anthracene, on the silole ring, we have invest...

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Bibliographic Details
Published inNew journal of chemistry Vol. 33; no. 6; pp. 1290 - 1300
Main Authors Aubouy, Laurent, Huby, Nolwenn, Hirsch, Lionel, van der Lee, Arie, Gerbier, Philippe
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 01.01.2009
Royal Society of Chemistry [1987-....]
Subjects
Chemical Sciences
Chemistry
Chemistry, Multidisciplinary
Organic chemistry
Physical Sciences
Science & Technology
LIGHT-EMITTING-DIODES
ORGANIC ELECTROLUMINESCENT DEVICES
ELECTRONIC-PROPERTIES
TRANSPORT
PHOTOLUMINESCENCE
SEMICONDUCTORS
GROUP-14 METALLOLES
2,3,4,5-TETRAPHENYLSILOLES
EMISSION
HIGHLY EFFICIENT
OLED
Molecular engineering
Silole
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Summary:We report a molecular engineering study on optical, structural and electrical properties of seven silole derivates aimed at enhancing the charge carrier balance in single-layer devices. By functionalizing two hole-transporting groups, dipyridylamine and anthracene, on the silole ring, we have investigated the influence of both substituents on the hole current. We have concluded that in contrast to dipyridylamine groups, anthracene groups decrease the charge carrier balance since the latter groups not only increase the hole current but also electron contribution. Mixing these hole-transporting groups and doubling their number lead to a novel silole becoming a very efficient emissive layer exhibiting threshold voltage below 3 V and luminous efficiency L-e = 0.8 cd A(-1) at 7 V.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1144-0546
1369-9261
DOI:10.1039/b900780f