A solution processable fluorene-benzothiadiazole small molecule for n-type organic field-effect transistors

Karyn Mutkins; Ke Gui; Muhsen Aljada; Paul E Schwenn; Ebinazar B Namdas; Paul L Burn; Paul Meredith

doi:10.1063/1.3569818

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A solution processable fluorene-benzothiadiazole small molecule for n-type organic field-effect transistors

Journal article

Peer reviewed

A solution processable fluorene-benzothiadiazole small molecule for n-type organic field-effect transistors

Karyn Mutkins, Ke Gui, Muhsen Aljada, Paul E Schwenn, Ebinazar B Namdas, Paul L Burn and Paul Meredith

Applied Physics Letters, Vol.98(15)

2011

DOI: https://doi.org/10.1063/1.3569818

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Abstract

We report an n-type organic semiconductor [2-({7-(9,9-di-n-propyl-9H- fluoren-2-yl}benzo[c][1,2,5]thiadiazol-4-yl)methylene]malononitrile (herein referred to as K12) for use in organic field-effect transistors (OFETs). K12 can be processed by spin-coating from solution or by vacuum deposition, organizing into highly orientated microcrystalline structures at modest (75°C) annealing temperatures. OFETs with n-octyltrichlorosilane or hexamethyldisilazane monolayers, or poly(propylene-co-1-butene) (PPCB) modified dielectric surfaces were prepared. The mobility, ON/OFF ratio, threshold voltage, and current hysteresis were found to be dependent on the thermal history of the film and surface onto which it was deposited. The highest OFET mobility achieved was 2.4× 10-3 cm2 /V s, for spin-coated films with a PPCB modified silicon dioxide dielectric.

Details

Title: A solution processable fluorene-benzothiadiazole small molecule for n-type organic field-effect transistors
Authors: Karyn Mutkins (Author) - University of Queensland
Ke Gui (Author) - University of Queensland
Muhsen Aljada (Author) - University of Queensland
Paul E Schwenn (Author) - University of Queensland
Ebinazar B Namdas (Author) - University of Queensland
Paul L Burn (Author) - University of Queensland
Paul Meredith (Author) - University of Queensland
Publication details: Applied Physics Letters, Vol.98(15)
Publisher: A I P Publishing LLC
Date published: 2011
DOI: 10.1063/1.3569818
ISSN: 0003-6951
Organisation Unit: University of the Sunshine Coast, Queensland; Thompson Institute
Language: English
Record Identifier: 99450762302621
Output Type: Journal article

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