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Issue 19, 2016
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Ultrathin and ultrasmooth Au films as transparent electrodes in ITO-free organic light-emitting devices

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Abstract

An ultrathin, ultrasmooth and flexible Au film as an alternative of the indium–tin oxide (ITO) electrode in organic light-emitting devices (OLEDs) has been reported. The 7 nm Au film shows excellent surface morphology, optical and electronic characteristics including a root-mean-square roughness of 0.35 nm, a high transparency of 72% at 550 nm, and a sheet resistance of 23.75 Ω sq−1. These features arise from the surface modification of the glass substrate by using a SU-8 film, which fixes metal atoms via chemical bond interactions between Au and SU-8 film to suppress the island growth mode. A 17% enhancement in current efficiency has been obtained from the OLEDs based on the ultrathin Au electrodes compared to that of the devices with the ITO electrodes. The OLEDs with the ultrathin Au/SU-8 anodes exhibit high flexibility and mechanical robustness.

Graphical abstract: Ultrathin and ultrasmooth Au films as transparent electrodes in ITO-free organic light-emitting devices

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Publication details

The article was received on 22 Jan 2016, accepted on 15 Apr 2016 and first published on 18 Apr 2016


Article type: Communication
DOI: 10.1039/C6NR00599C
Citation: Nanoscale, 2016,8, 10010-10015
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    Ultrathin and ultrasmooth Au films as transparent electrodes in ITO-free organic light-emitting devices

    Y. Bi, J. Feng, J. Ji, Y. Chen, Y. Liu, Y. Li, Y. Liu, X. Zhang and H. Sun, Nanoscale, 2016, 8, 10010
    DOI: 10.1039/C6NR00599C

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