Fullerene Based n-type Organic Thin-Film Transistors

2005 ◽  
Vol 871 ◽  
Author(s):  
Joshua Haddock ◽  
Benoit Domercq ◽  
Bernard Kippelen
Keyword(s):  
Organic Semiconductors ◽  
Field Effect Transistors ◽  
High Vacuum ◽  
Channel Length ◽  
Organic Films ◽  
Limiting Factor ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
P Type ◽  
Made In

AbstractSignificant progress has been made in the area of p-type organic field effect transistors while progress in developing n-type materials and devices has been comparatively lacking, a limiting factor in the pursuit to develop complementary organic electronic circuits. Given the need for n-type organic semiconductors we have carried out studies using two different fullerene molecules, C60 and C70. Here, we report mobilities for C60 ranging from 0.02 cm2/Vs up to 0.65 cm2/Vs (depending on channel length), and mobilities from 0.003 cm2/Vs up to 0.066 cm2/Vs for C70. All devices were fabricated with organic films deposited under high vacuum but tested at ambient pressures under nitrogen.

scholarly journals 2,2'-(Arylenedivinylene)bis-8-hydroxyquinolines exhibiting aromatic π-π stacking interactions as solution-processable p-type organic semiconductors for high-performance organic field effect transistors

2021 ◽  
Author(s):  
Suman Yadav ◽  
Shivani Sharma ◽  
Satinder K Sharma ◽  
Chullikkattil P. Pradeep
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistor ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Effect Transistor ◽  
Solution Processable ◽  
P Type

Solution-processable organic semiconductors capable of functioning at low operating voltages (~5 V) are in demand for organic field-effect transistor (OFET) applications. Exploration of new classes of compounds as organic thin-film...

scholarly journals Channel length-dependent characterisations of organic thin-film transistors with solution processable gadolinium phthalocyanine derivatives

2019 ◽  
Vol 31 (1) ◽  
pp. 265-273 ◽  
Author(s):  
Seema Barard ◽  
Debdyuti Mukherjee ◽  
Sujoy Sarkar ◽  
T. Kreouzis ◽  
I. Chambrier ◽  
...  
Keyword(s):  
Field Effect ◽  
Liquid Crystalline ◽  
Field Effect Transistors ◽  
Channel Length ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Active Layers ◽  
Order Of Magnitude ◽  
Scaling Down ◽  
Voltage Swing

AbstractSpin-coated 52-nm-thick films of newly synthesised gadolinium liquid crystalline bisphthalocyanine sandwich (GdPc2) complexes with octyl chains non-peripheral positions have been successfully employed as active layers for bottom-gate organic field effect transistors having both short $$(5\,\upmu {\text{m}})$$(5μm) and long $$( 20\,\upmu {\text{m}})$$(20μm) channels. The scaling down of the channel length $$( L )$$(L) decreases the field effect mobility due to the increase in the contact resistance between the gold electrodes and the GdPc2 semiconducting layer. Values of on–off ratio and sub-threshold voltage swing are higher nearly one order of magnitude for $$L = 5 \,\upmu{\text{ m}}$$L=5μm than those for $$L = 20\;\upmu m$$L=20μm.

Electrostatic Spray Deposition of Highly-Crystalline TIPS Pentacene Thin Films for Fabrication of Organic Field-Effect Transistors

2012 ◽  
Vol 1501 ◽  
Author(s):  
Norio Onojima ◽  
Hiroki Saito ◽  
Naomichi Nishio ◽  
Takamasa Kato
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Spray Deposition ◽  
Solution Process ◽  
Channel Length ◽  
Organic Films ◽  
Organic Field Effect Transistors ◽  
Electrostatic Spray Deposition ◽  
Promising Solution ◽  
Electrostatic Spray

ABSTRACTThis paper demonstrates that electrostatic spray deposition (ESD) method is a promising solution process to fabricate highly-crystalline organic films (6,13-bis(triisopropylsilylethynyl) pentacene; TIPS pentacene) for the use in bottom-contact organic field-effect transistors (OFETs). We obtained large crystalline domains (i.e., molecularly-oriented domains) by using an o-DCB:acetone mixed solvent (1:1), and observed good transistor behavior in an OFET having the channel length of 20 μm.

scholarly journals Syntheses of dibenzo[d,d']benzo[2,1-b:3,4-b']difuran derivatives and their application to organic field-effect transistors

2016 ◽  
Vol 12 ◽  
pp. 805-812 ◽  
Author(s):  
Minh Anh Truong ◽  
Koji Nakano
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Photoluminescence Spectroscopy ◽  
Organic Field Effect Transistors ◽  
Semiconducting Properties ◽  
P Type ◽  
Conjugated Compounds

Ladder-type π-conjugated compounds containing a benzo[2,1-b:3,4-b']difuran skeleton, such as dibenzo[d,d']benzo[2,1-b:3,4-b']difuran (syn-DBBDF) and dinaphtho[2,3-d:2',3'-d']benzo[2,1-b:3,4-b']difuran (syn-DNBDF) were synthesized. Their photophysical and electrochemical properties were revealed by UV–vis absorption and photoluminescence spectroscopy and cyclic voltammetry. Organic field-effect transistors (OFETs) were fabricated with these compounds as organic semiconductors, and their semiconducting properties were evaluated. OFETs with syn-DBBDF and syn-DNBDF showed typical p-type characteristics with hole mobilities of <1.5 × 10−3 cm2·V−1·s−1 and <1.0 × 10−1 cm2·V−1·s−1, respectively.

Organic Field-Effect Transistors, Inverters, and Logic Circuits on Gate Electrets

2005 ◽  
Vol 889 ◽  
Author(s):  
Cheng Huang ◽  
James E. West ◽  
Howard E. Katz
Keyword(s):  
Organic Semiconductors ◽  
Electric Fields ◽  
Dielectric Layer ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Logic Circuits ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Electronic Components ◽  
Assembled Monolayers

ABSTRACTBy incorporating dielectrics with stored electric fields and organic semiconductors, new organic electronic components such as circuits with controlling voltages “restored” for transistor tuning can be developed. We have successfully used excellent electret materials including charged and surface-treated silicon dioxide (SiO2) and silsesquioxane (SSQ) polymers as the dielectric layer in organic field-effect transistors (OFETs). Charge injection and quasipermanent charge storage induce threshold voltage shifts and current modulation, which results from the built-in electric fields in the conduction channels. Static and dynamic characteristics of organic thin-film transistors (OTFTs) such as charging conditions and voltage/current retention were evaluated. In addition, self-assembled monolayers (SAMs) of dipolar molecules have been utilized in the dielectric layer, with different mechanisms but similar effects compared to charged dielectrics. We also present new OFET unipolar inverters, comprised of only two simple OTFTs with enhancement-mode driver and depletion-mode load to implement full-swing organic logic circuits for process simplification of electronic components in organic electronics.

scholarly journals Exploring the Critical Thickness of Organic Semiconductor Layer for Enhanced Piezoresistive Sensitivity in Field-Effect Transistor Sensors

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1583 ◽  
Author(s):  
Damien Thuau ◽  
Katherine Begley ◽  
Rishat Dilmurat ◽  
Abduleziz Ablat ◽  
Guillaume Wantz ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Field Effect ◽  
High Performance ◽  
Critical Thickness ◽  
Field Effect Transistors ◽  
Mechanical Strain ◽  
Semiconductor Layer ◽  
Organic Field Effect Transistors ◽  
P Type

Organic semiconductors (OSCs) are promising transducer materials when applied in organic field-effect transistors (OFETs) taking advantage of their electrical properties which highly depend on the morphology of the semiconducting film. In this work, the effects of OSC thickness (ranging from 5 to 15 nm) on the piezoresistive sensitivity of a high-performance p-type organic semiconductor, namely dinaphtho [2,3-b:2,3-f] thieno [3,2–b] thiophene (DNTT), were investigated. Critical thickness of 6 nm thin film DNTT, thickness corresponding to the appearance of charge carrier percolation paths in the material, was demonstrated to be highly sensitive to mechanical strain. Gauge factors (GFs) of 42 ± 5 and −31 ± 6 were measured from the variation of output currents of 6 nm thick DNTT-based OFETs engineered on top of polymer cantilevers in response to compressive and tensile strain, respectively. The relationship between the morphologies of the different thin films and their corresponding piezoresistive sensitivities was discussed.

Soft template assisted self-assembly: a general strategy toward two-dimensional molecular crystals for high-performance organic field-effect transistors

2022 ◽  
Author(s):  
Xinzi Tian ◽  
Jiarong Yao ◽  
Siyu Guo ◽  
Zhaofeng Wang ◽  
Yanling Xiao ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
High Performance ◽  
Field Effect Transistors ◽  
Molecular Crystals ◽  
Soft Template ◽  
General Strategy ◽  
Two Dimensional ◽  
Organic Field Effect Transistors ◽  
Intrinsic Properties

Two-dimensional molecular crystals (2DMCs) are highly desirable to probe the intrinsic properties in organic semiconductors and are promising candidates for constructing high-performance optoelectronic devices. Liquids such as water are favorable...

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