(Invited) Non Quasi Static Modeling of Printed Organic Thin Film Transistors in Large Signal and Small Signal Operation

In this work, we review the physical properties of organic materials and transistors, discussing especially the charge transport mechanisms. Finally, we present an analytical and continuous charge model for Organic Thin Film Transistors (OTFTs) from which analytical expressions of all the total capacitances are obtained. They are developed and finally written as continuous explicit functions of the applied voltage, resulting in a complete charge-based small-signal model composed by a unified charge control model derived from Poisson equation assuming an exponential density of localized states. This charge model was developed from a previously proposed analytical DC current model assuming a hopping based transport. Therefore our complete small signal model has the potential to be successfully used in circuit simulators for the design of OTFTs.

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A DC and small signal AC model for organic thin film transistors including contact effects and non quasi static regime

Organic Electronics ◽

10.1016/j.orgel.2016.11.027 ◽

2017 ◽

Vol 41 ◽

pp. 345-354 ◽

Cited By ~ 13

Author(s):

A. Valletta ◽

M. Rapisarda ◽

S. Calvi ◽

G. Fortunato ◽

M. Frasca ◽

...

Keyword(s):

Thin Film ◽

Thin Film Transistors ◽

Organic Thin Film Transistors ◽

Small Signal ◽

Organic Thin Film ◽

Static Regime ◽

Contact Effects

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Effective performance improvement of organic thin film transistors with multi-layer modifications

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020200138 ◽

2020 ◽

Vol 91 (3) ◽

pp. 30201

Author(s):

Hang Yu ◽

Jianlin Zhou ◽

Yuanyuan Hao ◽

Yao Ni

Keyword(s):

Thin Film ◽

Thin Film Transistors ◽

Performance Enhancement ◽

Organic Thin Film Transistors ◽

Electrical Performance ◽

Hole Injection ◽

Organic Thin Film ◽

Effective Performance ◽

Significant Performance ◽

P Type

Organic thin film transistors (OTFTs) based on dioctylbenzothienobenzothiophene (C8BTBT) and copper (Cu) electrodes were fabricated. For improving the electrical performance of the original devices, the different modifications were attempted to insert in three different positions including semiconductor/electrode interface, semiconductor bulk inside and semiconductor/insulator interface. In detail, 4,4′,4′′-tris[3-methylpheny(phenyl)amino] triphenylamine (m-MTDATA) was applied between C8BTBTand Cu electrodes as hole injection layer (HIL). Moreover, the fluorinated copper phthalo-cyanine (F16CuPc) was inserted in C8BTBT/SiO2 interface to form F16CuPc/C8BTBT heterojunction or C8BTBT bulk to form C8BTBT/F16CuPc/C8BTBT sandwich configuration. Our experiment shows that, the sandwich structured OTFTs have a significant performance enhancement when appropriate thickness modification is chosen, comparing with original C8BTBT devices. Then, even the low work function metal Cu was applied, a normal p-type operate-mode C8BTBT-OTFT with mobility as high as 2.56 cm2/Vs has been fabricated.

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A Proposal of High Performance Organic Thin Film Transistors

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.130.161 ◽

2010 ◽

Vol 130 (2) ◽

pp. 161-166

Author(s):

Yoshinori Ishikawa ◽

Yasuo Wada ◽

Toru Toyabe ◽

Ken Tsutsui

Keyword(s):

Thin Film ◽

Thin Film Transistors ◽

High Performance ◽

Organic Thin Film Transistors ◽

Organic Thin Film

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Photo-Induced Threshold and Onset Voltage Shifts in Organic Thin-Film Transistors

IEICE Transactions on Electronics ◽

10.1587/transele.e96.c.1360 ◽

2013 ◽

Vol E96.C (11) ◽

pp. 1360-1366 ◽

Cited By ~ 3

Author(s):

Ichiro FUJIEDA ◽

Tse Nga NG ◽

Tomoya HOSHINO ◽

Tomonori HANASAKI

Keyword(s):

Thin Film ◽

Thin Film Transistors ◽

Organic Thin Film Transistors ◽

Organic Thin Film ◽

Onset Voltage

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PREPARATION AND CHARACTERIZATION OF POLYVINYL ALCOHOL THIN FILMS FOR ORGANIC THIN FILM TRANSISTORS AND BIOMEDICAL APPLICATIONS

Kongunadu Research Journal ◽

10.26524/krj264 ◽

2018 ◽

Vol 5 (2) ◽

pp. 16-18

Author(s):

Chandar Shekar B ◽

Ranjit Kumar R ◽

Dinesh K.P.B ◽

Sulana Sundar C ◽

Sunnitha S ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Thin Film Transistors ◽

Gravimetric Method ◽

Dip Coating ◽

Organic Thin Film Transistors ◽

Poly Vinyl Alcohol ◽

Organic Thin Film ◽

Glass Substrates ◽

Coating Method

Thin films of poly vinyl alcohol (PVA) were prepared on pre-cleaned glass substrates by Dip Coating Method. FTIR spectrum was used to identify the functional groups present in the prepared films. The vibrational peaks observed at 1260 cm-1 and 851 cm-1 are assigned to C–C stretching and CH rocking of PVA.The characteristic band appearing at 1432 cm-1 is assigned to C–H bend of CH2 of PVA. The thickness of the prepared thin films were measured by using an electronic thickness measuring instrument (Tesatronic-TTD20) and cross checked by gravimetric method. XRD spectra indicated the amorphous nature of the films.Surface morphology of the coated films was studied by scanning electron microscope (SEM). The surface revealed no pits and pin holes on the surface. The observed surface morphology indicated that these films could be used as dielectric layer in organic thin film transistors and as drug delivery system for wound healing.

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