Share Email Print
cover

Proceedings Paper

High-efficiency silole-based molecular organic light-emitting devices using highly conducting polymer anode contacts
Author(s): Woohong Kim; Leonidas C Palilis; Manabu Uchida; Zakya H. Kafafi
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We present high efficiency and high luminance molecular organic light-emitting diodes (MOLEDs) using a conducting polymer as a hole-injecting electrode (anode), a CsF/Al bilayer as a cathode, and silole derivatives as an emitter and/or an electron transporter. The conducting polymer films, poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS), were either spin-cast from aqueous dispersions or pre-coated on plastic substrates (courtesy Agfa Gevaert N.V. Belgium). The surface sheet resistance of the conducting polymer films is in the range of 150Ohms/sq ~ 1500 Ohms/sq. MOLEDs fabricated with a low sheet resistance (150 Ohms/sq) conducting polymer as an anode without using an ITO underlayer and CsF/Al as a cathode exhibit very low operating voltages (4.5V @ 100 cd/m2 and 6.5V @ 1,000 cd/m2). This good device performance is attributable to the low sheet resistance of the conducting polymer anode and the high electron mobility of the silole derivative, namely 2,5-bis-(2',2"-bipyridin-6-yl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), used as an electron transporter. Efficient electron injection from the CSF/Al cathode to the PyPySPyPy electron injection/transport layer also contributes to better charge balance and improved device efficiency.

Paper Details

Date Published: 16 February 2004
PDF: 8 pages
Proc. SPIE 5214, Organic Light-Emitting Materials and Devices VII, (16 February 2004); doi: 10.1117/12.509646
Show Author Affiliations
Woohong Kim, Naval Research Lab. (United States)
Leonidas C Palilis, Naval Research Lab. (United States)
Manabu Uchida, Chisso Corp. (United States)
Zakya H. Kafafi, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 5214:
Organic Light-Emitting Materials and Devices VII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

© SPIE. Terms of Use
Back to Top