Novel Transparent Conductive Films

Physical Sciences : Materials and Compounds

Available for licensing

Inventors

  • Rodney Ruoff, Ph.D. , Mechanical Engineering
  • Iskandar Kholmanov , Microelectronics Research Center

Background/unmet need

Transparent conductive films (TCFs) are widely used as in displays, solar cells, transistors, sensors, and in energy storage systems. New devices and emerging technologies are setting additional criteria for TCFs: in addition to good optical transmittance and electrical conductivity, it is desirable to have high chemical and thermal stability, compatibility with other functional components of devices, ease of integration in flexible electronics, and of course low cost. This has stimulated research to develop new TCFs, since widely used indium tin oxide (ITO) films cannot fulfill all these requirements.

Invention Description

The hybrid films demonstrate synergy between the three different nanostructures used to yield better TCF performance. In particular, the hybrid film has better adhesion to the substrate compared to only Ag NW film due to the graphene-based materials on top of the NWs. Additionally, the RG-O film might act as a protective layer for the metal NWs underneath. This is particularly important because metal NWs are usually more reactive than RG-O and may be easily damaged by oxidation or corrosion under ambient conditions. It is expected that such hybrid TCFs might improve the performance of existing and emerging devices.

Benefits/Advantages

  • The transparent conductive films are fully compatible with commercial devices.
  • These films can be manufactured at lower cost compared to Indium Tin Oxide (ITO).
  • The films provide improved adhesion properties compared with ITO.

Features

  • Good electrical conductivity and high optical transmittance
  • Multi-component hybrid structure with controlled nanoscale architecture
  • Better film performance due to the synergy between single components

Development Stage

Proof of concept

IP Status