Blade Coating On Nanogrooved Substrates Yielding Aligned Thin Films Of High Mobility Semiconductin Polymers

Tech ID: 29288 / UC Case 2015-437-0

Brief Description

An alternative method of alignment specifically developed for field-effect transistors of organic electronics.


The semiconducting nature of conjugated polymers are of great interest for a variety of organic applications such as organic field-effect transistors (OFETs). To be viable for real applications, a major focus has been on enhancing charge carrier mobility. Aligning conjugated polymers is a common route to enhance charge carrier mobility. There are currently a number of techniques that align films, which increases carrier charge mobility due to fewer grain boundaries and higher intrachain charge transport, though they each leave room for improvement.


Researchers at the University of California, Santa Barbara, have developed an alternative method of alignment known as “blade coating” where films are coated on substrates with uniaxial nanogrooves. This invention is specifically developed for field-effect transistors of organic electronics. A critical requirement for the commercialization of organic electronics is the development of a continuous coating or printing process. The lab-scale blade coating parameters developed here establish a crucial framework for the potential large-scale manufacturing of field-effect transistors with high charge carrier mobility.


  • Allows for large scale manufacturing
  • High charge carrier mobility
  • Continuous coating or printing process for commercialization


  • Organic Field-effect Transistor Devices
  •  Flexible Displays

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 10,186,661 01/22/2019 2015-437


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  • Chabinyc, Michael L.
  • Heeger, Alan J.
  • Kramer, Edward J.
  • Luo, Chan
  • Patel, Shrayesh N.

Other Information


inadvmat, OFET, Organic field-effect transistor, Flexible displays, Charge carrier mobility, Organic electronics, Continuous coating, Continuous printing, Large-scale manufacturing

Categorized As