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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
Published on: June 23, 2017
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Ultrahigh electrical conductivity in solution-sheared polymeric transparent films.
Brian J Worfolk1, Sean C Andrews1, Steve Park2
1Department of Chemical Engineering, Stanford University, Stanford, CA 94305; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
Summary
We developed a scalable method for fabricating transparent conductors using poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films. This technique achieves record electrical conductivity and high transparency for flexible electronics.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- The demand for flexible, high-performance transparent conductors (TCs) is increasing with the rise of flexible consumer electronics.
- Current TCs often face limitations in mechanical robustness, conductivity, or cost, hindering their integration into advanced optoelectronic devices.
Purpose of the Study:
- To develop a scalable fabrication method for high-performance, mechanically robust, and inexpensive transparent conductors.
- To achieve record electrical conductivity and high optical transparency in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films.
Main Methods:
- Scalable fabrication of PEDOT:PSS thin films using a solution shearing technique.
- Precise control over deposition conditions to tune phase separation and PEDOT backbone alignment.
Main Results:
- Achieved record-high electrical conductivities of 4,600 ± 100 S/cm.
- Maintained high optical transparency in the fabricated PEDOT:PSS films.
- Demonstrated the practical viability of these TCs as patterned electrodes in capacitive touch sensors and organic photovoltaics.
Conclusions:
- Solution shearing offers a scalable route to high-performance transparent conductors.
- The developed PEDOT:PSS films show significant promise for integration into flexible optoelectronic devices.
- This work addresses the need for advanced TCs in the rapidly evolving consumer electronics market.
