Hole-injection properties of annealed polythiophene films to replace PEDOT-PSS in multilayered OLED systems

Synthetic Metals Volume 159 Issue 3-4 Page 214-217 published_at 2009
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Title ( eng )
Hole-injection properties of annealed polythiophene films to replace PEDOT-PSS in multilayered OLED systems
Creator
Tada Yosuke
Kunai Atsutaka
Kunugi Yoshihito
Source Title
Synthetic Metals
Volume 159
Issue 3-4
Start Page 214
End Page 217
Abstract
Hole-injection properties of annealed poly(alkoxy- and alkylthiophene) films in OLEDs were studied. Among them, annealed poly(3,3'-dihexyloxy-2,2'-bithiophene) (aPHOBT) film exhibited good hole-injection properties and a triple-layered OLED with the structure ITO/aPHOBT/PVK/Alq3/Mg-Ag (device I) showed much higher performance than a double-layered device without the aPHOBT layer (device II, ITO/PVK/Alq3/Mg-Ag). Device I was slightly inferior to a device having a PEDOT-PSS layeras the hole injector (device III, ITO/PEDOT- PSS/PVK/Alq3/Mg-Ag) in the low-intermediate region of the applied voltage (6-11 V), but gave comparable luminance to III when the applied voltage exceeded 11 V.
Keywords
Polythiophene; Hole-injection; OLED; Annealing
NDC
Metal and mining engineering [ 560 ]
Language
eng
Resource Type journal article
Publisher
Elsevier Science SA
Date of Issued 2009
Rights
Copyright (c) 2008 Elsevier B.V.
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 0379-6779
[DOI] 10.1016/j.synthmet.2008.09.002
[NCID] AA00446016
[DOI] http://dx.doi.org/10.1016/j.synthmet.2008.09.002