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Enhanced current efficiency of organic light-emitting devices due to a broad localized surface plasmonic resonance of Au-ZnO nanocomposites

Title
Enhanced current efficiency of organic light-emitting devices due to a broad localized surface plasmonic resonance of Au-ZnO nanocomposites
Author
김태환
Keywords
Localized surface plasmonic resonance; Au-ZnO nanocomposites; Organic light-emitting devices; Au nanoparticles
Issue Date
2015-11
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v. 355, Page. 359-363
Abstract
Organic light-emitting devices (OLEDs) were fabricated with Au-ZnO nanocomposites (NCs) synthesized by using a sol-gel process in order to enhance their current efficiency. Photoluminescence (PL) and time-resolved PL spectra showed an enhanced fluorescence emission due to the localized surface plasmonic resonance (LSPR) of the Au-ZnO NCs. The electroluminescence intensity of the OLEDs with Au-ZnO NCs at a wavelength of 523 nm was significantly increased by a factor of 0.84 in comparison with that of the OLEDs with ZnO nanoparticles (NPs). The current efficiency of the OLEDs with Au-ZnO NCs at 50 mA/cm(2) was 0.46 cd/A higher than that of the OLEDs with ZnO NPs. The enhanced current efficiency in the OLEDs with Au-ZnO NCs was dominantly attributed to the existence of the LSPR due to the presence of the Au NPs in the ZnO layer. (c) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0169433215016669?via%3Dihubhttp://hdl.handle.net/20.500.11754/28842
ISSN
0169-4332; 1873-5584
DOI
10.1016/j.apsusc.2015.07.099
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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