Flexible organic light emitting diodes (OLEDs) based on a blue emitting polyfluorene

Flexible OLEDs were demonstrated using a highly efficient blue electroluminescent polyfluorene derivative. The flexible devices were fabricated on indium tin oxide (ITO) coated polyethylene terephthalate (PET) substrates with a sheet resistance of 35 Ω per sq. The emitting layer was poly[9,9‐di‐(2′‐...

Full description

Saved in:
Bibliographic Details
Published inPhysica status solidi. C Vol. 5; no. 12; pp. 3658 - 3662
Main Authors Vasilopoulou, M., Palilis, L. C., Botsialas, A., Georgiadou, D. G., Bayiati, P., Vourdas, N., Petrou, P. S., Pistolis, G., Stathopoulos, N. A., Argitis, P.
Format Journal Article
LanguageEnglish
Published Berlin WILEY-VCH Verlag 01.12.2008
WILEY‐VCH Verlag
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:Flexible OLEDs were demonstrated using a highly efficient blue electroluminescent polyfluorene derivative. The flexible devices were fabricated on indium tin oxide (ITO) coated polyethylene terephthalate (PET) substrates with a sheet resistance of 35 Ω per sq. The emitting layer was poly[9,9‐di‐(2′‐ethylhexyl)fluorenyl‐2,7‐diyl] (PF). A significant improvement of the luminance and device efficiency was achieved by confining the exciton formation zone within PF by two wide band‐gap materials, namely PVK as a hole transport layer (HTL) and an inorganic oxide layer (IOL) as an electron transport and hole blocking layer. In order to achieve full‐color LEDs based on a common host material, we probed the use of suitable dye emitters dispersed in PF at appropriate concentrations. The selection of the emitters is based on their capability to be effective energy transfer acceptors from the blue emitting PF. In particular, energy transfer was demonstrated from blue to green for PF‐doped with the green dye emitter 1‐[4‐(dimethylamino)phenyl]‐6‐phenylhexa‐1,3,5,‐triene (DMA‐DPH), and from blue to red for PF‐doped with the red dye emitter (4‐dimethylamino‐4′‐nitrostilbene) (DANS). This demonstration paves the way for developing highly efficient blue, green and red flexible OLEDs based on a common blue emitting PF host. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Bibliography:European Union (75%)
Greek Ministry of Education (25%)
ark:/67375/WNG-W3Q23SV0-0
istex:A4DE9B2C7EC31115F764DD3C2D10C97C3DA416CC
"Archimedes: Funding of research groups in TEI of Piraeus" project
ArticleID:PSSC200780214
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1862-6351
1610-1634
1610-1642
DOI:10.1002/pssc.200780214