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Highly Robust and Ultrasmooth Copper Nanowire Electrode by One-step Coating for Organic Light Emitting Diodes

Abstract

A novel copper nanowire (CuNW)/Chitosan composite transparent electrode is fabricated via a simple one-step solution process in the ambient air and the result film shows high electrical conductivity, air stability, low surface roughness and enhanced transmittance. After coating the chitosan dissolved in L-ascorbic acid solution, the copper oxide layer on the surface of the pristine CuNW reacts with the L-ascorbic acid and is reduced into metal copper. Meanwhile, under the effective protection of the chitosan, the CuNWs are welded well by thermal annealing in the air condition, resulting in a relative low sheet resistance of 19 Ω/sq with a transmittance of 81%. The chitosan fills the gaps between the nanowires and the nanostructure becomes more uniform, resulting in a low root mean square (RMS) of 6.2 nm and an enhancement of its transmittance. This CuNWs composite film can resist water/ethanol emersion and 120 °C aging test on the hot plate in air environment without obvious conductivity deterioration. Since the film can be easily removed by acid-base solution, it allows a feasible patterning process. Employing this film as anode, the OLED device shows higher performance than the device based on ITO anode.

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Publication details

The article was received on 15 Jun 2018, accepted on 30 Jul 2018 and first published on 02 Aug 2018


Article type: Paper
DOI: 10.1039/C8TC02937G
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Highly Robust and Ultrasmooth Copper Nanowire Electrode by One-step Coating for Organic Light Emitting Diodes

    L. Lian, H. Wang, D. Dong and G. He, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC02937G

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