The Quinonoid Zwitterion Interlayer for the Improvement of Charge Carrier Mobility in Organic Field-Effect Transistors

The interface between the semiconductor and the dielectric layer plays a crucial role in organic field-effect transistors (OFETs) because it is at the interface that charge carriers are accumulated and transported. In this study, four zwitterionic benzoquinonemonoimine dyes featuring alkyl and aryl N-substituents were used to cover the dielectric layers in OFET structures. The best interlayer material, containing aliphatic side groups, increased charge carrier mobility in the measured systems. This improvement can be explained by the reduction in the number of the charge carrier trapping sites at the dielectric active layer interface from 1014 eV−1 cm−2 to 2 × 1013 eV−1 cm−2. The density of the traps was one order of magnitude lower compared to the unmodified transistors. This resulted in an increase in charge carrier mobility in the tested poly [2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno [3,2-b]thiophene)] (DPPDTT)-based transistors to 5.4 × 10−1 cm2 V−1 s−1.

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Charge transport in disordered organic field-effect transistors

MRS Proceedings ◽

10.1557/proc-725-p10.9 ◽

2002 ◽

Vol 725 ◽

Cited By ~ 1

Author(s):

Cristina Tanase ◽

Paul W.M. Blom ◽

Eduard J. Meijer ◽

Dago M. de Leeuw

Keyword(s):

Charge Carrier ◽

Field Effect ◽

Carrier Mobility ◽

Field Effect Transistors ◽

Charge Carrier Mobility ◽

Charge Carriers ◽

Localized States ◽

Charge Carrier Density ◽

Organic Field Effect Transistors ◽

Good Agreement

AbstractThe transport properties of poly(2,5-thienylene vinylene) (PTV) field-effect transistors (FET) have been investigated as a function of temperature under controlled atmosphere. In a disordered semiconductor as PTV the charge carrier mobility, dominated by hopping between localized states, is dependent on the charge carrier density. The transfer characteristics of PTV FET have been modeled considering the distribution of charge carriers and mobility over the accumulation channel. Good agreement with the experimental data is obtained.

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Influence of the semiconductor thickness on the charge carrier mobility in P3HT organic field-effect transistors in top-gate architecture on flexible substrates

Organic Electronics ◽

10.1016/j.orgel.2010.01.023 ◽

2010 ◽

Vol 11 (5) ◽

pp. 814-819 ◽

Cited By ~ 59

Author(s):

Benedikt Gburek ◽

Veit Wagner

Keyword(s):

Charge Carrier ◽

Field Effect ◽

Carrier Mobility ◽

Field Effect Transistors ◽

Charge Carrier Mobility ◽

Flexible Substrates ◽

Organic Field Effect Transistors

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Dianthraceno[a,e]pentalenes: synthesis, crystallographic structures and applications in organic field-effect transistors

Chemical Communications ◽

10.1039/c4cc07630c ◽

2015 ◽

Vol 51 (3) ◽

pp. 503-506 ◽

Cited By ~ 45

Author(s):

Gaole Dai ◽

Jingjing Chang ◽

Wenhua Zhang ◽

Shiqiang Bai ◽

Kuo-Wei Huang ◽

...

Keyword(s):

Charge Carrier ◽

Field Effect ◽

Carrier Mobility ◽

Field Effect Transistors ◽

Charge Carrier Mobility ◽

Dense Packing ◽

Organic Field Effect Transistors ◽

High Charge ◽

Crystallographic Structures ◽

High Charge Carrier Mobility

Two stable dianthraceno[a,e]pentalenes were synthesized and DAP2 exhibited a high charge carrier mobility of 0.65 cm2 V−1 s−1 due to its dense packing.

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Effect of Film Morphology on Charge Transport in C60-based Organic Field Effect Transistors

MRS Proceedings ◽

10.1557/proc-1270-ii06-68 ◽

2010 ◽

Vol 1270 ◽

Cited By ~ 2

Author(s):

Mujeeb Ullah ◽

Andrey K. Kadashchuk ◽

Philipp Stadler ◽

Alexander Kharchenko ◽

Almantas Pivrikas ◽

...

Keyword(s):

Grain Size ◽

Charge Carrier ◽

Substrate Temperature ◽

Charge Transport ◽

Field Effect ◽

Carrier Mobility ◽

Field Effect Transistors ◽

Charge Carrier Mobility ◽

Film Morphology ◽

Organic Field Effect Transistors

AbstractThe critical factor that limits the efficiencies of organic electronic devices is the low charge carrier mobility which is attributed to disorder in organic films. In this work we study the effects of active film morphology on the charge transport in Organic Field Effect Transistors (OFETs). We fabricated the OFETs using different substrate temperature to grow different morphologies of C60 films by Hot Wall Epitaxy. Atomic Force Microscopy images and XRD results showed increasing grain size with increasing substrate temperature. An increase in field effect mobility was observed for different OFETs with increasing grain size in C60 films. The temperature dependence of charge carrier mobility in these devices followed the empirical relation named as Meyer-Neldel Rule and showed different activation energies for films with different degree of disorder. A shift in characteristic Meyer-Neldel energy was observed with changing C60 morphology which can be considered as an energetic disorder parameter.

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