Synthesis, field-effect and photovoltaic properties of random difluorobenzothiadiazole-isoindigo electron donor-acceptor polymers

2016 ◽  
Vol 134 ◽  
pp. 251-257 ◽  
Author(s):  
Ping Deng ◽  
Yanlian Lei ◽  
Bo Wu ◽  
Xuelin Zheng ◽  
Yong Lu ◽  
...  
Keyword(s):  
Electron Donor ◽  
Field Effect ◽  
Photovoltaic Properties ◽  
Donor Acceptor

scholarly journals Synthesis and photovoltaic properties of thieno[3,2-b]thiophenyl substituted benzo[1,2-b:4,5-b′]dithiophene copolymers

2014 ◽  
Vol 5 (23) ◽  
pp. 6710-6717 ◽  
Author(s):  
Zeyun Xiao ◽  
Jegadesan Subbiah ◽  
Kuan Sun ◽  
David J. Jones ◽  
Andrew B. Holmes ◽  
...  
Keyword(s):  
Solar Cell ◽  
Electron Donor ◽  
Building Block ◽  
Bulk Heterojunction ◽  
Heterojunction Solar Cell ◽  
Photovoltaic Properties ◽  
Bulk Heterojunction Solar Cell ◽  
Donor Acceptor

A new thienothiophene–benzodithiophene electron donor building block was synthesized and incorporated into 2-dimensional conjugated donor–acceptor polymers. The polymers were fully characterised and tested in bulk heterojunction solar cell devices.

scholarly journals Push-Pull Heterocyclic Dyes Based on Pyrrole and Thiophene: Synthesis and Evaluation of Their Optical, Redox and Photovoltaic Properties

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 34
Author(s):  
Sara S. M. Fernandes ◽  
Maria Cidália R. Castro ◽  
Dzmitry Ivanou ◽  
Adélio Mendes ◽  
Maria Manuela M. Raposo
Keyword(s):  
Electron Donor ◽  
Oxidation Potential ◽  
Cyanoacetic Acid ◽  
Strong Electron ◽  
Photovoltaic Properties ◽  
Heterocyclic Molecules ◽  
Acceptor Group ◽  
Donor Acceptor ◽  
Ethoxyl Group ◽  
Anchoring Groups

Three heterocyclic dyes were synthesized having in mind the changes in the photovoltaic, optical and redox properties by functionalization of 5-aryl-thieno[3,2-b]thiophene, 5-arylthiophene and bis-methylpyrrolylthiophene π-bridges with different donor, acceptor/anchoring groups. Knoevenagel condensation of the aldehyde precursors with 2-cyanoacetic acid was used to prepare the donor-acceptor functionalized heterocyclic molecules. These organic metal-free dyes are constituted by thieno[3,2-b]thiophene, arylthiophene, bis-methylpyrrolylthiophene, spacers and one or two cyanoacetic acid acceptor groups and different electron donor groups (alkoxyl, and pyrrole electron-rich heterocycle). The evaluation of the redox, optical and photovoltaic properties of these compounds indicate that 5-aryl-thieno[3,2-b]thiophene-based dye functionalized with an ethoxyl electron donor and a cyanoacetic acid electron acceptor group/anchoring moiety displays as sensitizer for DSSCs the best conversion efficiency (2.21%). It is mainly assigned to the higher molar extinction coefficient, long π-conjugation of the heterocyclic system, higher oxidation potential and strong electron donating capacity of the ethoxyl group compared to the pirrolyl moiety.

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

scholarly journals Hysteresis Behavior of the Donor–Acceptor-Type Ambipolar Semiconductor for Non-Volatile Memory Applications

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 301
Author(s):  
Young Jin Choi ◽  
Jihyun Kim ◽  
Min Je Kim ◽  
Hwa Sook Ryu ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Memory Device ◽  
Non Volatile Memory ◽  
Device Applications ◽  
Donor Acceptor ◽  
Effect Transistor ◽  
Volatile Memory ◽  
Memory Applications

Donor–acceptor-type organic semiconductor molecules are of great interest for potential organic field-effect transistor applications with ambipolar characteristics and non-volatile memory applications. Here, we synthesized an organic semiconductor, PDPPT-TT, and directly utilized it in both field-effect transistor and non-volatile memory applications. As-synthesized PDPPT-TT was simply spin-coated on a substrate for the device fabrications. The PDPPT-TT based field-effect transistor showed ambipolar electrical transfer characteristics. Furthermore, a gold nanoparticle-embedded dielectric layer was used as a charge trapping layer for the non-volatile memory device applications. The non-volatile memory device showed clear memory window formation as applied gate voltage increases, and electrical stability was evaluated by performing retention and cycling tests. In summary, we demonstrate that a donor–acceptor-type organic semiconductor molecule shows great potential for ambipolar field-effect transistors and non-volatile memory device applications as an important class of materials.

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