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9 October 2005 Cathodoluminescence and electroluminescence from multi-layered organic structures induced by field electron emission from carbon nanotubes
Alexander A. Kuznetzov, Alexander A. Zakhidov, Raquel Ovalle, Rashmi Nanjundaswami, Christopher Williams, Mei Zhang, Sergey B. Lee, John Ferraris, Anvar A. Zakhidov
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Proceedings Volume 5937, Organic Light-Emitting Materials and Devices IX; 593720 (2005) https://doi.org/10.1117/12.617876
Event: Optics and Photonics 2005, 2005, San Diego, California, United States
Abstract
We report the observation of cathodoluminescence (CL) of organic multilayers of tris-(8-hydroxyquinoline) aluminium (Alq3) and 2- (4biphenyl)-5-(4-t-butylphenyl)-1,3,4-oxadiazole (PBD) deposited on ITO-coated glass, with and without hole transport layer and compare it with electroluminescence (EL) from similar devices. Excitation of the CL of such multilayer organic anodes was accomplished by low energy electrons field emitted by single walled carbon nanotube cathodes. The dependence of CL spectrum and intensity on voltage (V), current (I), type of transport layer and the cathode-anode geometry has been studied. We propose carbon nanotubes as efficient cathodes for stable CL emission from multi-layer anodes at small cathode-anode separations. The role of hole-transport layer is also discussed.
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Alexander A. Kuznetzov, Alexander A. Zakhidov, Raquel Ovalle, Rashmi Nanjundaswami, Christopher Williams, Mei Zhang, Sergey B. Lee, John Ferraris, and Anvar A. Zakhidov "Cathodoluminescence and electroluminescence from multi-layered organic structures induced by field electron emission from carbon nanotubes", Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 593720 (9 October 2005); https://doi.org/10.1117/12.617876
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KEYWORDS
Electroluminescence
Carbon nanotubes
Organic light emitting diodes
Electrodes
Electron beams
Ionization
Thin films
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