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Title: Air-stable solution-processed n-channel organic thin film transistors with polymerenhanced morphology

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4919677· OSTI ID:1286903
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Alabama, Tuscaloosa, AL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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N,N0-1H,1H-perfluorobutyl dicyanoperylenecarboxydiimide (PDIF-CN2) is an n-type semiconductor exhibiting high electron mobility and excellent air stability. However, the reported electron mobility based on spin-coated PDIF-CN2 film is much lower than the value of PDIF-CN2 single crystals made from vapor phase deposition, indicating significant room for mobility enhancement. In this study, various insulating polymers, including poly(vinyl alcohol), poly(methyl methacrylate) (PMMA), and poly(alpha-methylstyrene) (PaMS), are pre-coated on silicon substrate aiming to enhance the morphology of the PDIF-CN2 thin film, thereby improving the charge transport and air stability. Atomic force microscopy images reveal that with the pre-deposition of PaMS or PMMA polymers, the morphology of the PDIF-CN2 polycrystalline films is optimized in semiconducting crystal connectivity, domain size, and surface roughness, which leads to significant improvement of organic thin-film transistor (OTFT) performance. Particularly, an electron mobility of up to 0.55 cm2/V s has been achieved from OTFTs based on the PDIF-CN2 film with the pre-deposition of PaMS polymer.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1286903
Journal Information:
Applied Physics Letters, Vol. 106, Issue 18; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

References (26)

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Cited By (11)

Poly(α-methylstyrene) polymer and small-molecule semiconductor blend with reduced crystal misorientation for organic thin film transistors journal July 2019
Small-molecule additives for organic thin film transistors journal November 2019
Phase segregation effect on TIPS pentacene crystallization and morphology for organic thin film transistors journal February 2020
Long-range crystal alignment with polymer additive for organic thin film transistors journal June 2019
Reversing and non-reversing effects of PEEK-HA composites on tuning cooling rate during crystallization journal November 2019
Nanoscale alignment of semiconductor crystals for high-fidelity organic electronics applications journal May 2019
Polymer additive controlled morphology for high performance organic thin film transistors journal January 2019
A N–H functionalized perylene diimide with strong red-light absorption for green solvent processed organic electronics journal January 2020
Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors journal July 2015
Nanoparticles for organic electronics applications journal January 2020
Conjugated Polymer Controlled Morphology and Charge Transport of Small-Molecule Organic Semiconductors journal March 2020

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