scholarly journals Elaboration of low-band-gap π-conjugated systems based on thieno[3,4-b]pyrazines

2020 ◽  
Vol 92 (2) ◽  
pp. 335-353
Author(s):  
Nathalie Cheminet ◽  
Sandra L. Nogueira ◽  
Oumayma Benaqqa ◽  
Zakaria El Malki ◽  
Mohamed Bourass ◽  
...  
Keyword(s):  
Small Molecules ◽  
Band Gap ◽  
Building Block ◽  
Experimental Methods ◽  
Electronic Contribution ◽  
Absorption Properties ◽  
Conjugated Molecules ◽  
Low Band Gap ◽  
Conjugated Systems ◽  
Donor Acceptor

AbstractIn order to understand the electronic contribution of the thienopyrazine building block on the electronic properties of π-conjugated systems, small molecules containing thiophene and thienopyrazine moieties are synthesized and jointly studied by theoretical (DFT) and experimental methods (UV-Vis, UPS). Taking advantages of these preliminar attractive results, four low band gap extended structures have been elaborated on the base of Donor-Acceptor-Donor sequences (DAD); these elongated π-conjugated molecules exhibit noticeable electronic and absorption properties spreading from the near UV to NIR regions.

A facile method to synthesize [A′(D′AD)2]-based push–pull small molecules for organic photovoltaics

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 66005-66012 ◽  
Author(s):  
Mohamed Shaker ◽  
Jong-Hoon Lee ◽  
Cuc Kim Trinh ◽  
Wonbin Kim ◽  
Kwanghee Lee ◽  
...  
Keyword(s):  
Small Molecules ◽  
Band Gap ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Photovoltaics ◽  
Power Conversion ◽  
Low Band Gap ◽  
Donor Acceptor

Synthesis of promising new composition low band gap small molecules based on the push–pull (donor–acceptor) system, which displayed power conversion efficiency of up to 3.24%.

Low Band Gap Donor-Acceptor Conjugated Systems Based on 3-Alkoxy or 3-Pyrrolidino-4-cyanothiophene and Benzothiadiazole Units

2017 ◽  
Vol 12 (15) ◽  
pp. 1935-1943 ◽  
Author(s):  
Gurunathan Savitha ◽  
Chady Moussallem ◽  
Magali Allain ◽  
Frédéric Gohier ◽  
Pierre Frère
Keyword(s):  
Band Gap ◽  
Low Band Gap ◽  
Conjugated Systems ◽  
Donor Acceptor

Inside Cover: Low Band Gap Donor-Acceptor Conjugated Systems Based on 3-Alkoxy or 3-Pyrrolidino-4-cyanothiophene and Benzothiadiazole Units (Chem. Asian J. 15/2017)

2017 ◽  
Vol 12 (15) ◽  
pp. 1838-1838
Author(s):  
Gurunathan Savitha ◽  
Chady Moussallem ◽  
Magali Allain ◽  
Frédéric Gohier ◽  
Pierre Frère
Keyword(s):  
Band Gap ◽  
Low Band Gap ◽  
Conjugated Systems ◽  
Donor Acceptor

Synthesis and characterization of acceptor–donor–acceptor-based low band gap small molecules containing benzoselenadiazole

2016 ◽  
Vol 94 (6) ◽  
pp. 553-558 ◽  
Author(s):  
Baji Shaik ◽  
Jin-Hee Han ◽  
Dong Jin Song ◽  
Hun-Min Kang ◽  
Sang-Gyeong Lee
Keyword(s):  
Thermal Stability ◽  
Small Molecules ◽  
Band Gap ◽  
Nitrile Group ◽  
Band Gaps ◽  
Synthesis And Characterization ◽  
Low Band Gap ◽  
Good Thermal Stability ◽  
Donor Acceptor

Acceptor–donor–acceptor-type compounds 5′,5″-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3′-dodecyl-2,2′-bithiophene-5-carbonitrile) (9) and 4,4′-(5,5′-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3-dodecylthiophene-5,2-diyl))dibenzonitrile (10) were designed and synthesized. These compounds differ in terminal positions, compound 9 with a thiophene-containing nitrile group and compound 10 with a phenyl-containing nitrile group. Both compounds have shown good thermal stability and low band gap. The band gaps of compounds 9 and 10 were 1.74 and 1.83 eV, respectively. These results indicate that they are promising materials for use in optoelectronics.

scholarly journals Facile synthesis of low band-gap DPP–EDOT containing small molecules for solar cell applications

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 28788-28796 ◽  
Author(s):  
Venkatesan Govindan ◽  
Chun Guey Wu
Keyword(s):  
Solar Cell ◽  
Small Molecules ◽  
Band Gap ◽  
Facile Synthesis ◽  
Low Band Gap ◽  
Photovoltaic Applications ◽  
Donor Type ◽  
Donor Acceptor

Four donor–donor–acceptor–donor–donor type small molecules were synthesized (by direct alkylation) for photovoltaic applications.

Design and Synthesis of a Low Band Gap Conjugated Macroinitiator:  Toward Rod−Coil Donor−Acceptor Block Copolymers

2006 ◽  
Vol 39 (13) ◽  
pp. 4289-4297 ◽  
Author(s):  
Karin Van De Wetering ◽  
Cyril Brochon ◽  
Chheng Ngov ◽  
Georges Hadziioannou
Keyword(s):  
Block Copolymers ◽  
Band Gap ◽  
Low Band Gap ◽  
Design And Synthesis ◽  
Donor Acceptor
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