Journal
ACS NANO
Volume 5, Issue 12, Pages 9877-9882Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn203576v
Keywords
silver nanowire; transparent electrode; solar cells; TiO2; solution process; self-assembly; capillary force
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Funding
- Engineering School of UCLA
- Office of Naval Research [N00014-04-1-0434]
- Kavli Foundation
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Silver nanowire (AgNW) networks are promising candidates to replace indium-tin-oxide (ITO) as transparent conductors. However, complicated treatments are often required to fuse crossed AgNWs to achieve low resistance and good substrate adhesion. In this work, we demonstrate a simple and effective solution method to achieve highly conductive AgNW composite films with excellent optical transparency and mechanical properties. These properties are achieved via sequentially applying TiO2 sol-gel and PEDOT:PSS solution to treat the AgNW film. TiO2 solution volume shrinkage and the capillary force induced by solvent evaporation result in tighter contact between crossed AgNWs and improved film conductivity. The PEDOT:PSS coating acts as a protecting layer to achieve strong adhesion. Organic photovoltaic devices based on the AgNW-TiO2-PEDOT:PSS transparent conductor have shown comparable performance to those based on commercial ITO substrates.
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