Efficient molecular organic light emitting diodes based on silole derivatives

Leonidas C. Palilis; Antti Johannes Makinen; Hideyuki Murata; Manabu Uchida; Zakya H. Kafafi

doi:10.1117/12.489064

3 March 2003 Efficient molecular organic light emitting diodes based on silole derivatives

Leonidas C. Palilis, Antti Johannes Makinen, Hideyuki Murata, Manabu Uchida, Zakya H. Kafafi

Proceedings Volume 4800, Organic Light-Emitting Materials and Devices VI; (2003) https://doi.org/10.1117/12.489064
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

Citation Download Citation

Leonidas C. Palilis, Antti Johannes Makinen, Hideyuki Murata, Manabu Uchida, and Zakya H. Kafafi "Efficient molecular organic light emitting diodes based on silole derivatives", Proc. SPIE 4800, Organic Light-Emitting Materials and Devices VI, (3 March 2003); https://doi.org/10.1117/12.489064

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