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Scalable Process for High Performance Polymer Transparent Conductors


Stanford Reference:

15-375


Abstract


Researchers in Prof. Zhenan Bao’s laboratory have developed a scalable solution shearing process for fabricating low cost, high performance, flexible polymer film for transparent conductors (TCs) in optoelectronic devices. The film formed from highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) that is fabricated with specific control over deposition conditions. This enables tunable phase separation and preferential PEDOT backbone alignment resulting in record-high electrical conductivities with high optical transparency. This film offers a low cost, mechanically robust alternative to traditional TC materials for applications such as displays, touch screens, solar cells and flexible electronics.

Stage of Research
The inventors have fabricated the film and demonstrated record-high electrical conductivity of 4600 +/- 100 S/cm while maintaining high optical transparency. They have validated their utility as patterned electrodes in capacitive touch sensors and organic photovoltaics.

Applications


  • Transparent conductors - PEDOT:PSS polymer film with end user applications such as:
    • displays
    • organic solar cells
    • touch screens
    • flexible electronics

Advantages


  • High performance - 4600 +/- 100 S/cm conductivity; 17 +/- 1 ohm/sq. sheet resistance at 97.2% +/- 0.4% transmission
  • Scalable, tunable manufacturing - fast, high-throughput solution processing with unprecedented kinetic control over film deposition morphology, composition and anisotropy which results in controllable electrical and optical properties
  • Flexible, low-cost film - PEDOT:PSS films are less expensive and more mechanically robust than conventional ITO (indium tin oxide)

Publications



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Patent Status



Date Released

 1/21/2016 12:00
 

Licensing Contact


Evan Elder, Senior Licensing Associate
650-725-9558 (Mobile)
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Related Keywords


materials: thin film   PS: materials: polymer   chemical: coating   coatings   PS: materials: conductive polymers   PS: hardware: flexible displays   PS: electronics: flexible   PS: thin film: flexible   material coating   materials: processing   materials: transparent conductor   PS: materials: organic semiconductor   PS: clean energy: organic photovoltaic   PS: thin film: organic   PEDOT   PS: clean energy: thin film photovoltaic   solution processing   PS: thin film: deposition   PS: thin film: optoelectronics   PS: hardware: touch displays   Transparent conducting electrodes   PS: electronics: transparent