Direct observation of the evolution of both the HOMO and LUMO energy levels of a silole derivative at a magnesium/silole interface

Neil J. Watkins; Antti J Makinen; Yongli Gao; Manabu Uchida; Zakya H. Kafafi

doi:10.1117/12.515300

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16 February 2004 Direct observation of the evolution of both the HOMO and LUMO energy levels of a silole derivative at a magnesium/silole interface

Neil J. Watkins, Antti J Makinen, Yongli Gao, Manabu Uchida, Zakya H. Kafafi

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Proceedings Volume 5214, Organic Light-Emitting Materials and Devices VII; (2004) https://doi.org/10.1117/12.515300
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The electronic structure of the interface formed by Mg deposition onto 2,5-bis(6’-(2’,2"-bipyridyl))-1,1-dimethyl-3,4-diphenyl silacyclopentadiene (PyPySPyPy) was investigated using ultraviolet, inverse, and X-ray photoemission spectroscopies. PyPySPyPy is of interest for use as an electron injection/transport layer in high efficiency organic light-emitting diodes. Upon deposition of Mg onto PyPySPyPy there is a shift of the occupied energy level structure to higher binding energy, away from the Fermi level, and appearance of two energy levels within the energy gap of PyPySPyPy. The lowest unoccupied molecular orbital is also shifted to higher binding energy.

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Neil J. Watkins, Antti J Makinen, Yongli Gao, Manabu Uchida, and Zakya H. Kafafi "Direct observation of the evolution of both the HOMO and LUMO energy levels of a silole derivative at a magnesium/silole interface", Proc. SPIE 5214, Organic Light-Emitting Materials and Devices VII, (16 February 2004); https://doi.org/10.1117/12.515300

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