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Potentiometric parameterization of dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene field-effect transistors with a varying degree of non-idealities

Kim, Chang-Hyun, Thomas, Suzanne, Kim, Ji Hwan, Elliott, Martin, MacDonald, John Emyr and Yoon, Myung-Han 2018. Potentiometric parameterization of dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene field-effect transistors with a varying degree of non-idealities. Advanced Electronic Materials 4 (7) , 1700514. 10.1002/aelm.201700514

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Abstract

Organic transistors with different structures are investigated to address the applicability and reliability of parameter extraction. A dinaphtho[2,3‐b:2′,3′‐f]thieno[3,2‐b]thiophene channel is coupled with pristine or functionalized gold bottom and top contacts to reveal a geometrical impact on the device performance and nonidealities. Scanning Kelvin probe microscopy is employed as a key method to quantify the channel and contact potential in operation. Taking full account of the contact effects and including an explicit threshold voltage in calculation are shown to be critical to access the intrinsic carrier mobility, while simple derivative‐based extraction may over‐ or underestimate it. Further analytical developments correlate individual physical parameters, leading to the discovery that pentafluorobenzenethiol self‐assembled on gold predominantly affects the carrier mobility rather than the injection barrier.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Wiley: 12 months
ISSN: 2199-160X
Date of First Compliant Deposit: 1 June 2018
Date of Acceptance: 25 March 2018
Last Modified: 29 Jul 2019 20:44
URI: http://orca.cf.ac.uk/id/eprint/111904

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