The Influence of Diketopyrrolopyrrole Chemical Structure on Organic Field-Effect Transistors Performance

2016 ◽  
Vol 851 ◽  
pp. 189-193
Author(s):  
Stanislav Stříteský ◽  
Jozef Krajčovič ◽  
Martin Vala ◽  
Martin Weiter
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
Soluble Group ◽  
Gate Dielectrics ◽  
Field Effect Transistors ◽  
Charge Trapping ◽  
Charge Carrier Mobility ◽  
Self Assembled Monolayers ◽  
Organic Field Effect Transistors ◽  
Assembled Monolayers

Organic semiconductors are suitable for application in biosensors and sensors based on transistors. The influence of soluble group modifications on the performance of diketopyrrolopyrrole-based organic field-effect transistors (OFETs) is studied. The lowest mobility 1·10-9 cm2/Vs was observed for non-symmetric substitution O,N. Measurable charge carrier mobility was observed due to reduction of the density charge trapping states after application of organosilane self-assembled monolayers (SAMs) on thinner gate-dielectrics (90 nm). We report similar drift mobility 1·10-7 cm2/Vs for smallest soluble group “butyl” as for biggest group “EthylAdamantyl” in N,N and O,O substitution prepared by spin-coating.

scholarly journals Charge Trapping by Self-Assembled Monolayers as the Origin of the Threshold Voltage Shift in Organic Field-Effect Transistors

Small ◽  
2011 ◽  
Vol 8 (2) ◽  
pp. 241-245 ◽  
Author(s):  
Fatemeh Gholamrezaie ◽  
Anne-Marije Andringa ◽  
W. S. Christian Roelofs ◽  
Alfred Neuhold ◽  
Martijn Kemerink ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Charge Trapping ◽  
Self Assembled Monolayers ◽  
Organic Field Effect Transistors ◽  
Threshold Voltage Shift ◽  
Voltage Shift ◽  
Assembled Monolayers ◽  
Self Assembled

scholarly journals Controlling charge injection by self-assembled monolayers in bottom-gate and top-gate organic field-effect transistors

2011 ◽  
Vol 161 (21-22) ◽  
pp. 2226-2229 ◽  
Author(s):  
Fatemeh Gholamrezaie ◽  
Kamal Asadi ◽  
Romero A.H.J. Kicken ◽  
Bea M.W. Langeveld-Voss ◽  
Dago M. de Leeuw ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Charge Injection ◽  
Self Assembled Monolayers ◽  
Organic Field Effect Transistors ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Bottom Gate

Surface Modifications using Thiol Self-Assembled Monolayers on Au Electrodes in Organic Field Effect Transistors

2006 ◽  
Vol 965 ◽  
Author(s):  
Nobuya Hiroshiba ◽  
Ryotaro Kumashiro ◽  
Naoya Komatsu ◽  
Yusuke Suto ◽  
Hisao Ishii ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Preparation Condition ◽  
Self Assembled Monolayers ◽  
Carrier Injection ◽  
Organic Field Effect Transistors ◽  
Assembled Monolayers ◽  
Surface Contact Angle ◽  
Self Assembled ◽  
Angle Method

ABSTRACTThe influences of self-assembled-monolayers (SAMs) modifications on the gold electrodes in organic field effect transistors are studied using benzen-thiols (BzTs) having amino (NH2), nitro (NO2) and methyl (CH3) substituents and pentacene as an organic semiconductor. The field effect transistor (FET) characteristics are found to be very sensitive to the preparation condition of the SAMs modified surfaces. This can be rationalized in terms of the barriers against carrier injections made by SAMs and this situation can be monitored using a surface contact-angle method. The enhancement in the field effect mobilities μ is observed when the SAMs modifications to the electrodes are applied, and this could be caused by the higher efficiency of carrier injection attained by the hole transfer from SAMs to pentacene molecules.

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