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Proceedings Paper

Efficient molecular organic light emitting diodes based on silole derivatives
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Paper Abstract

We report the performance of molecular organic light-emitting diodes (MOLEDs) using silole derivatives as emissive and electron transport materials. Two siloles, namely 2,5-di-(3-biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP) and 1,2-bis(1-methyl-2,3,4,5,-tetraphenylsilacyclopentadienyl)ethane (2PSP), with high PL quantum yields of 94% and 85%, respectively, were used as emissive materials. Another silole, namely 2,5-bis-(2',2"-bipyridin-6-yl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), was used as the electron transport material. MOLEDs using these two siloles and NPB as the hole transport material show a low operating voltage of approximately 4.5 V at a luminance of 100 cd/m2 and high external electroluminescence (EL) quantum efficiencies of 3.4% and 3.8%, respectively, at 100 A/m2. MOLEDs based on PPSPP exhibit a red-shifted EL spectrum which is assigned to an exciplex formed at the PPSPP:NPB interface.

Paper Details

Date Published: 3 March 2003
PDF: 15 pages
Proc. SPIE 4800, Organic Light-Emitting Materials and Devices VI, (3 March 2003); doi: 10.1117/12.489064
Show Author Affiliations
Leonidas C. Palilis, Naval Research Lab. (United States)
SFA, Inc. (United States)
Antti Johannes Makinen, Naval Research Lab. (United States)
Hideyuki Murata, Japan Advanced Institute of Science and Technology (United States)
Manabu Uchida, Chisso Corp. (Japan)
SFA Inc. (United States)
Zakya H. Kafafi, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 4800:
Organic Light-Emitting Materials and Devices VI
Zakya H. Kafafi; Homer Antoniadis, Editor(s)

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