scholarly journals Modeling of Grazing-Incidence X-ray Diffraction from Naphthyl End-Capped Oligothiophenes in Organic Field-Effect Transistors

2020 ◽  
Vol 20 (6) ◽  
pp. 3968-3978
Author(s):  
Michael J. Winokur ◽  
Mathias K. Huss-Hansen ◽  
Andreas E. Lauritzen ◽  
Mika Torkkeli ◽  
Jakob Kjelstrup-Hansen ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Grazing Incidence ◽  
Organic Field Effect Transistors ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals A Quinacridone-Diphenylquinoxaline-Based Copolymer for Organic Field-Effect Transistors

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 563 ◽  
Author(s):  
Yong Jeong ◽  
Jeong Oh ◽  
Ho Song ◽  
Tae An
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Coupling Reaction ◽  
Hole Mobility ◽  
Organic Field Effect Transistors ◽  
Field Effect Mobility ◽  
X Ray Diffraction ◽  
Suzuki Coupling Reaction ◽  
X Ray ◽  
Heat Treated

In this work, we characterized poly(quinacridone-diphenylquinoxaline) (PQCTQx). PQCTQx was synthesized by a Suzuki coupling reaction and the synthesized PQCTQx was used as a polymeric semiconducting material in organic field-effect transistors (OFETs) to research the potential of using quinacridone derivatives. The measured field-effect mobility of the pristine PQCTQx film was 6.1 × 10−3 cm2/(V·s). A PQCTQx film heat-treated at 150 °C exhibited good field-effect performances with a hole mobility of 1.2 × 10−2 cm2/(V·s). The improved OFET behaviors resulting from the mild thermal treatment was attributed to improved packing of the molecules in the film, as determined using X-ray diffraction, and to decreased channel resistance.

Organic Field-Effect Transistors Based on 3’-Flouro-2,2',6,6'-Tetraphenyl-4,4'-Dipyranylidene

2019 ◽  
Vol 288 ◽  
pp. 37-43
Author(s):  
Altan Bolag ◽  
Yoshiro Yamashita
Keyword(s):  
Field Effect ◽  
Density Functional ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
Visible Spectroscopy ◽  
Functional Theory ◽  
X Ray ◽  
Contact Configuration

In this work, 3’-flouro-2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (3FDP) was originally synthesized and investigated with density functional theory (DFT) calculations, ultraviolet–visible spectroscopy (UV–Vis) and cyclic voltammetry (CV) in comparison with 2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (DP) and 4’-flouro-2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (4FDP). 3FDP-based organic field-effect transistors (OFETs) were fabricated with bottom contact configuration on bare SiO2/Si substrate, 1,1,1,3,3,3-hexamethyldisilazane (HMDS) and octadecyltrichlorosilane (OTS) treated substrate, respectively. The HMDS-treated device showed highest mobility of 4 × 10−4 cm2 V−1 s−1, on/off ratio of 4 × 103 and threshold voltage of −10 V. Finally, vacuum deposited 3FDP films morphology was investigated by X-ray diffraction (XRD) analyses and the results showed higher crystallinity of HMDS-treated 3FDP film compared to the OTS-treated film, leading to a better FET performance.

Chemical potential shift in organic field-effect transistors identified by soft X-ray operando nano-spectroscopy

2015 ◽  
Vol 106 (25) ◽  
pp. 251604 ◽  
Author(s):  
Naoka Nagamura ◽  
Yuta Kitada ◽  
Junto Tsurumi ◽  
Hiroyuki Matsui ◽  
Koji Horiba ◽  
...  
Keyword(s):  
Field Effect ◽  
Chemical Potential ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Potential Shift ◽  
X Ray

Preparation, Characterization, and FET Properties of 3,3',5,5'-Tetra-Phenyldiphenoquinone

2019 ◽  
Vol 288 ◽  
pp. 44-50
Author(s):  
Xiao Ying Zhang ◽  
Altan Bolag ◽  
Yun Wu ◽  
Yoshiro Yamashita
Keyword(s):  
Field Effect Transistors ◽  
Hole Mobility ◽  
Crystal Structure Analysis ◽  
Organic Field Effect Transistors ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Contact Configuration ◽  
Single Crystal Structure Analysis

In this work, tetraphenyldiphenoquinone (DPQ) was synthesized and characterized by single crystal structure analysis, ultraviolet–visible spectroscopy (UV–Vis) and cyclic voltammetry (CV). DPQ–based organic field-effect transistors (OFET) were fabricated with bottom contact configuration using bare SiO2/Si substrate and hexamethyldisilazane (HMDS) treated substrate, respectively. The HMDS-treated device showed hole mobility of 8.7 × 10−7 cm2 V−1 s−1, current on/off ratio of 1.2 × 102 and threshold voltage of −39 V. Devices with bare substrate showed no FET behaviors. Finally, film morphology was investigated by X-ray diffraction (XRD) analyses and the results showed that the HMDS treatment exhibits better crystallinity of DPQ on the film thus obtaining FET performance.

scholarly journals Isolation and Characterization of the Unexpected 1-N-Octyloxyperopyrene: A Solution-Processable P-Type Organic Semi-Conductor

2019 ◽  
Author(s):  
Marta Martínez-Abadía ◽  
Gabriella Antonicelli ◽  
Akinori Saeki ◽  
Manuel Melle-Franco ◽  
Aurelio Mateo-Alonso
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Electrical Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isolation And Characterization ◽  
Polycyclic Aromatic ◽  
P Type ◽  
Liquid Deposition

<div><div><div><p>The synthesis and optical, electrochemical, thermal and electrical characterization of a new and unexpected 1-n-octyloxyperopyrene is reported. The structure of 1-n- octyloxyperopyrene has been unambiguously established by single crystal X-ray diffraction. The solubility of this polycyclic aromatic hydrocarbon, endowed by the alkoxy substituent, allows the fabrication of thin film field-effect transistors by liquid deposition methods. These devices show hole mobilities up to 1.61 × 10–3 cm2 V–1 s–1.</p></div></div></div>

Morphology and Field-Effect Mobility Characterization of Planar Five-Ring-Fused Dithiophene-Dione

2013 ◽  
Vol 331 ◽  
pp. 452-455 ◽  
Author(s):  
Jing Wang
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Layer By Layer ◽  
Organic Field Effect Transistors ◽  
Field Effect Mobility ◽  
X Ray Diffraction ◽  
Vapor Growth ◽  
Face To Face ◽  
Atomic Force ◽  
Substrate Temperatures

The thin films of compound 2,7-dihexyl-4,9-dihydro-s-indaceno [1,2-b:5,6-b']- dithiophene-4,9-dione were grown by physical vapor growth at different substrate temperatures. The morphology of surfaces was characterized by atomic force microscope and X-ray diffraction, which exhibits increased crystal grain size and film order with the increase of substrate temperature. The molecule exhibits layer-by-layer packing on the Si/SiO2 substrate and the tilt angle with respect to the substrate is 49.5°, which form extended slipped face-to-face π-stacking in each layer. This result indicates that molecular packing in the thin film is similar to that in the single crystal. The organic field-effect transistors (OFETs) incorporating this compound shows a field effect mobility at the order of 10-3 cm2V-1s-1 and an on-off ratio of 4 × 106 with good air-stability.

scholarly journals 5,7,12,14-Tetraphenyl-Substituted 6,13-Diazapentacenes as Versatile Organic Semiconductors: Characterization in Field Effect Transistors

2020 ◽  
Vol 02 (03) ◽  
pp. 204-213
Author(s):  
Miriam Hauschild ◽  
Michal Borkowski ◽  
Pavlo O. Dral ◽  
Tomasz Marszalek ◽  
Frank Hampel ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
X Ray ◽  
X Ray Crystallography ◽  
Vis Spectroscopy ◽  
Theoretical Investigations ◽  
Solid State Structures ◽  
Semiconductor Properties

We report the synthesis of 5,7,12,14-tetraphenyl-substituted 6,13-dihydro-6,13-diazapentacene and its fully aromatic 6,13-diazapentacene congener. Both arylated diazapentacenes were characterized by X-ray crystallography to investigate their solid-state structures and by UV–vis spectroscopy and cyclic voltammetry to unveil their electronic properties. The experimental results are complemented with theoretical investigations. The semiconductor properties of both diazapentacene derivatives were assessed in organic field-effect transistors, whereby the fully aromatized compound showed comparably less abundant n-type behavior.

scholarly journals Electrohydrodynamic-Jet (EHD)-Printed Diketopyrrolopyroole-Based Copolymer for OFETs and Circuit Applications

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1759 ◽  
Author(s):  
Kyunghun Kim ◽  
Se Hyun Kim ◽  
Hyungjin Cheon ◽  
Xiaowu Tang ◽  
Jeong Hyun Oh ◽  
...  
Keyword(s):  
High Voltage ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Logic Circuit ◽  
Ring Oscillator ◽  
Organic Field Effect Transistors ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Supply Condition

We report the employment of an electrohydrodynamic-jet (EHD)-printed diketopyrrolopyrrole-based copolymer (P-29-DPPDTSE) as the active layer of fabricated organic field-effect transistors (OFETs) and circuits. The device produced at optimal conditions showed a field-effect mobility value of 0.45 cm2/(Vs). The morphologies of the printed P-29-DPPDTSE samples were determined by performing optical microscopy, X-ray diffraction, and atomic force microscopy experiments. In addition, numerical circuit simulations of the optimal printed P-29-DPPDTSE OFETs were done in order to observe how well they would perform in a high-voltage logic circuit application. The optimal printed P-29-DPPDTSE OFET showed a 0.5 kHz inverter frequency and 1.2 kHz ring oscillator frequency at a 40 V supply condition, indicating the feasibility of its use in a logic circuit application at high voltage.

scholarly journals Isolation and Characterization of the Unexpected 1-N-Octyloxyperopyrene: A Solution-Processable P-Type Organic Semi-Conductor

2019 ◽  
Author(s):  
Marta Martínez-Abadía ◽  
Gabriella Antonicelli ◽  
Akinori Saeki ◽  
Manuel Melle-Franco ◽  
Aurelio Mateo-Alonso
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Electrical Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isolation And Characterization ◽  
Polycyclic Aromatic ◽  
P Type ◽  
Liquid Deposition

<div><div><div><p>The synthesis and optical, electrochemical, thermal and electrical characterization of a new and unexpected 1-n-octyloxyperopyrene is reported. The structure of 1-n- octyloxyperopyrene has been unambiguously established by single crystal X-ray diffraction. The solubility of this polycyclic aromatic hydrocarbon, endowed by the alkoxy substituent, allows the fabrication of thin film field-effect transistors by liquid deposition methods. These devices show hole mobilities up to 1.61 × 10–3 cm2 V–1 s–1.</p></div></div></div>

Sign in / Sign up

Export Citation Format

Share Document