Tunable Color Parallel Tandem Organic Light Emitting Devices with Carbon Nanotube and Metallic Sheet Interlayers

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Tunable Color Parallel Tandem Organic Light Emitting Devices with Carbon Nanotube and Metallic Sheet Interlayers

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Title: Tunable Color Parallel Tandem Organic Light Emitting Devices with Carbon Nanotube and Metallic Sheet Interlayers
Author(s):
Oliva, Jorge;
Papadimitratos, Alexios (UT Dallas);
Desirena, Haggeo;
De la Rosa, Elder;
Zakhidov, Anvar A. (UT Dallas)
Item Type: Article
Keywords: Show Keywords
Abstract: Parallel tandem organic light emitting devices (OLEDs) were fabricated with transparent multiwall carbon nanotube sheets (MWCNT) and thin metal films (Al, Ag) as interlayers. In parallel monolithic tandem architecture, the MWCNT (or metallic films) interlayers are an active electrode which injects similar charges into subunits. In the case of parallel tandems with common anode (C. A.) of this study, holes are injected into top and bottom subunits from the common interlayer electrode; whereas in the configuration of common cathode (C. C.), electrons are injected into the top and bottom subunits. Both subunits of the tandem can thus be monolithically connected functionally in an active structure in which each subunit can be electrically addressed separately. Our tandem OLEDs have a polymer as emitter in the bottom subunit and a small molecule emitter in the top subunit. We also compared the performance of the parallel tandem with that of in series and the additional advantages of the parallel architecture over the in-series were: tunable chromaticity, lower voltage operation, and higher brightness. Finally, we demonstrate that processing of the MWCNT sheets as a common anode in parallel tandems is an easy and low cost process, since their integration as electrodes in OLEDs is achieved by simple dry lamination process.
Publisher: American Institute of Physics
ISSN: 0021-8979
Persistent Link: http://hdl.handle.net/10735.1/5056
http://dx.doi.org/10.1063/1.4935538
Bibliographic Citation: Oliva, Jorge, Alexios Papadimitratos, Haggeo Desirena, Elder De la Rosa, et al. 2015. "Tunable color parallel tandem organic light emitting devices with carbon nanotube and metallic sheet interlayers." Journal of Applied Physics 118(19), doi: 10.1063/1.4935538
Terms of Use: ©2015 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Sponsors: This work was supported by funding of the Welch Foundation grant AT-1617, U.S. Department of Energy STTR Grant Nos. DE-SC0001145 and DE-SC00003664, and the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST “MISiS” (No. K2-2015-014).

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