期刊
ADVANCED FUNCTIONAL MATERIALS
卷 21, 期 9, 页码 1709-1716出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201002021
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资金
- UK Engineering and Physical Sciences Research Council (EPSRC)
- European Regional Development Agency/Advantage West Midlands Science City Materials Initiative [2]
- Royal Academy of Engineering/EPSRC
A rapid, solvent free method for the fabrication of highly transparent ultrathin (similar to 8 nm) Au films on glass has been developed. This is achieved by derivatizing the glass surface with a mixed monolayer of 3-mercaptopropyl(trimethoxysilane) and 3-aminopropyl(trimethoxysilane) via co-deposition from the vapor phase, prior to Au deposition by thermal evaporation. The mixed monolayer modifies the growth kinetics, producing highly conductive films (similar to 11 Omega per square) with a remarkably low root-mean-square roughness (similar to 0.4 nm) that are exceptionally robust towards UV/O-3 treatment and ultrasonic agitation in a range of common solvents. As such, they are potentially widely applicable for a variety of large area applications, particularly where stable, chemically well-defined, ultrasmooth substrate electrodes are required, such as in organic optoelectronics and the emerging fields of nanoelectronics and nanophotonics. By integrating microsphere lithography into the fabrication process, we also demonstrate a means of tuning the transparency by incorporating a random array of circular apertures into the film. The application of these nanostructured Au electrodes is demonstrated in efficient organic photovoltaic devices where it offers a compelling alternative to indium tin oxide coated glass.
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