scholarly journals Solution-sheared thin films of a donor-acceptor random copolymer/polystyrene blend as active material in field-effect transistors

2019 ◽  
Vol 93 ◽  
pp. 105-110 ◽  
Author(s):  
Francesca Leonardi ◽  
Qiaoming Zhang ◽  
Yun-Hi Kim ◽  
Marta Mas-Torrent
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Active Material ◽  
Random Copolymer ◽  
Donor Acceptor

scholarly journals Donor-Acceptor Interaction in Films of Tetracene–Tetracyanoquinodimethane Heterostructures and Composites

2018 ◽  
Vol 63 (1) ◽  
pp. 70
Author(s):  
M. P. Gorishnyi ◽  
A. B. Verbitsky
Keyword(s):  
Thin Films ◽  
Absorption Spectra ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Composite Films ◽  
Charge Transfer Complexes ◽  
Acceptor Interaction ◽  
Light Emitting ◽  
Donor Acceptor ◽  
First Time

The structures and the absorption and photovoltaic spectra of thin films of tetracene (TC) and tetracyanoquinodimethane (TCNQ), as well as the films of their heterostructures (TC/TCNQ) and composites (TC + TCNQ), have been studied. The heterostructures and composites are obtained by the thermal sputtering of the components – successively or simultaneously, respectively – in vacuum. The photovoltaic spectra were measured, by using the condenser method. It is found for the first time that the largest changes ΔD1 in the TC/TCNQ and TC + TCNQ absorption spectra with respect to the sum of the absorption spectra of the components are observed in the intervals of TCNQ dimeric bands at 2.214 eV (ΔD1 < 0) and in all TC bands (ΔD1 > 0). Those changes testify to the formation of charge transfer complexes between the TC (the electron donor) and TCNQ (the electron acceptor) molecules at the interfaces in the TC/TCNQ heterostructures and in the bulk of TC + TCNQ composites, which is also confirmed by the appearance of TC+- and TCNQ−-bands in the photovoltaic spectra of both the heterostructure and composite films. This result is important for a deeper understanding of the operating mechanisms in various potentially imaginable devices based on those heterostructures and composites (solar cells, field-effect transistors, and light-emitting diodes).

scholarly journals Oligofuran–Benzothiadiazole Co-oligomers: Synthesis, Optoelectronic Properties and Reactivity

2021 ◽  
Vol 03 (02) ◽  
pp. 303-308
Author(s):  
Dror Ben Abba Amiel ◽  
Choongik Kim ◽  
Ori Gidron
Keyword(s):  
Organic Solar Cells ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Light Emitting Diodes ◽  
Organic Field Effect Transistors ◽  
Active Materials ◽  
Light Emitting ◽  
Organic Light ◽  
Donor Acceptor ◽  
Optical Bandgaps

Donor–acceptor–donor (DAD) triad systems are commonly applied as active materials in ambipolar organic field-effect transistors, organic solar cells, and NIR-emitting organic light-emitting diodes. Often, these triads utilize oligothiophenes as donors, whereas their oxygen-containing analogs, oligofurans, are far less studied in this setup. Here we introduce a family of DAD triads in which the donors are oligofurans and the acceptor is benzothiadiazole. In a combined computational and experimental study, we show that these triads display optical bandgaps similar to those of their thiophene analogs, and that a bifuran donor is sufficient to produce emission in the NIR spectral region. The presence of a central acceptor unit increases the photostability of oligofuran-based DAD systems compared with parent oligofurans of the similar length.

Influence of Electric Field on Microstructures of Pentacene Thin-Films in Field-Effect Transistors

2008 ◽  
Vol 18 (2) ◽  
pp. 285-293 ◽  
Author(s):  
H. L. Cheng ◽  
W. Y. Chou ◽  
C. W. Kuo ◽  
Y. W. Wang ◽  
Y. S. Mai ◽  
...  
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Field Effect ◽  
Field Effect Transistors

Microstructure engineering of polymer semiconductor thin films for high-performance field-effect transistors using a bi-component processing solution

2017 ◽  
Vol 5 (14) ◽  
pp. 3568-3578 ◽  
Author(s):  
Dong Gao ◽  
Zhihui Chen ◽  
Jianyao Huang ◽  
Weifeng Zhang ◽  
Congyuan Wei ◽  
...  
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Semiconductor Thin Films ◽  
Polymer Semiconductor ◽  
Processing Solution

The performance of polymer field-effect transistors was enhanced by microstructure engineering through the use of a bi-component solvent.

Two-Dimensional Tetrathienonaphthalenes-Based Donor–Acceptor Copolymers: Synthesis, Isomeric Effect, and Organic Field-Effect Transistors

2020 ◽  
Vol 53 (18) ◽  
pp. 7740-7748
Author(s):  
Huai-Hsuan Liu ◽  
Shao-Ling Chang ◽  
Kuo-Hsiu Huang ◽  
Fong-Yi Cao ◽  
Kuang-Yi Cheng ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Two Dimensional ◽  
Organic Field Effect Transistors ◽  
Donor Acceptor ◽  
Isomeric Effect

Improved charge transport in fused-ring bridged hemi-isoindigo-based small molecules by incorporating a thiophene unit for solution-processed organic field-effect transistors

2020 ◽  
Vol 8 (4) ◽  
pp. 1398-1404
Author(s):  
Guobing Zhang ◽  
Ruikun Chen ◽  
Yue Sun ◽  
Boseok Kang ◽  
Mingxiang Sun ◽  
...  
Keyword(s):  
Charge Transport ◽  
Small Molecules ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Solution Processed ◽  
Fused Ring ◽  
Donor Acceptor

Two acceptor–donor–acceptor small molecules based on fused ring as donor, and hemi-isoindigo units as acceptors were synthesized and characterized for solution-processed organic field-effect transistors.

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