Formation of highly crystalline organic semiconductor thin films by inkjet printed thickness gradients

Wontae Park, John E. Anthony, William S. Wong

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Highly crystalline organic semiconductor layers patterned from a solution was inkjet printed for the fabrication of TFTs. A novel printing process enabled the micro-scale control of the film formation through the use of precision spatial placement of printed droplets over the device structure. The printing process used temporal and spatial control of the printed droplets to form a crystallization gradient. The gradient, first nucleated over an electrode that defines the TFT structure is used to recrystallize subsequently printed droplets; the initial printed film was then used to recrystallize subsequent printed regions as the channel region is deposited along the channel length. This printed gradient provides a larger grain structure to form within the active region of the TFT.

Original languageEnglish
Title of host publicationOrganic and Hybrid Field-Effect Transistors XIX
EditorsIain McCulloch, Oana D. Jurchescu
ISBN (Electronic)9781510637580
StatePublished - 2020
EventOrganic and Hybrid Field-Effect Transistors XIX 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOrganic and Hybrid Field-Effect Transistors XIX 2020
Country/TerritoryUnited States
CityVirtual, Online

Bibliographical note

Publisher Copyright:
© 2020 SPIE.


  • Inkjet print
  • Organic thin film transistors
  • Solution printing process

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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