scholarly journals Synthesis and Photochemical Reaction of Poly(ester)s Containing Donor–Acceptor Type Norbornadiene Residues in the Both Main and Side Chains

2005 ◽  
Vol 37 (4) ◽  
pp. 246-254 ◽  
Author(s):  
Yoshitomo Ono ◽  
Naoyuki Kawashima ◽  
Hiroto Kudo ◽  
Takabumi Nagai ◽  
Tadatomi Nishikubo
Keyword(s):  
Photochemical Reaction ◽  
Side Chains ◽  
Donor Acceptor

Benzotriazole-based donor–acceptor type semiconducting polymers with different alkyl side chains for photovoltaic devices

2013 ◽  
Vol 108 ◽  
pp. 113-125 ◽  
Author(s):  
Ji-Hoon Kim ◽  
Hee Un Kim ◽  
Chang Eun Song ◽  
In-Nam Kang ◽  
Jin-Kyun Lee ◽  
...  
Keyword(s):  
Semiconducting Polymers ◽  
Side Chains ◽  
Photovoltaic Devices ◽  
Alkyl Side Chains ◽  
Donor Acceptor

A study of the thermoelectric properties of benzo[1,2-b:4,5-b′]dithiophene–based donor–acceptor conjugated polymers

2018 ◽  
Vol 9 (35) ◽  
pp. 4440-4447 ◽  
Author(s):  
Luhai Wang ◽  
Chengjun Pan ◽  
Zhongming Chen ◽  
Xiaoyan Zhou ◽  
Chunmei Gao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Side Chains ◽  
Organic Thermoelectric Materials ◽  
Donor Acceptor

Three benzo[1,2-b:4,5-b′]dithiophene (BDT)-based donor–acceptor (D–A) conjugated polymers with different side chains were designed, synthesized, and investigated as organic thermoelectric materials.

The application of double click to synthesize a third-order nonlinear polymer containing donor–acceptor chromophores

2016 ◽  
Vol 7 (22) ◽  
pp. 3714-3721 ◽  
Author(s):  
Dong Wang ◽  
Qingsen Guo ◽  
Hong Gao ◽  
Zhou Yang ◽  
Yan Xing ◽  
...  
Keyword(s):  
Linear Polymer ◽  
Side Chains ◽  
Third Order ◽  
Donor Acceptor

A new linear polymer containing the dialkylaniline-substituted electron-rich alkynes in the side chains was designed and synthesized by copper-catalyzed azide–alkyne cycloaddition (CuAAC).

scholarly journals Rational Design of Donor Acceptor Based Semiconducting Copolymers with High Dielectric Constant

2020 ◽  
Author(s):  
Aiswarya Abhisek Mohapatra ◽  
Yifan Dong ◽  
Puttaraju Boregowda ◽  
Ashutosh Mohanty ◽  
Aditya Sadhanala ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Organic Semiconductors ◽  
Density Functional ◽  
Rational Design ◽  
Dielectric Constants ◽  
Side Chains ◽  
Free Charge ◽  
Coulombic Interaction ◽  
Polymer Backbone ◽  
Donor Acceptor

<div> <div> <div> <p>An efficient photogeneration of free charge carriers has long been recognized as the paramount challenge in organic photovoltaic (OPV) devices. The low dielectric constant organic semiconductors fall short to reduce strong Coulombic interaction of tightly bound exciton and hence lead to a loss mechanism in OPVs due to charge-carrier recombination. To circumvent this problem, we adopt a strategy to enhance the dielectric constant of organic semiconductors by incorporating tetraethyleneglycol (TEG) side-chains. We report synthesis of three new semiconducting copolymers by combining thiophene substituted diketopyrrolopyrrole (TDPP) monomer with three other monomeric units with varying electron donating strength: benzodithiophene (BBT-3TEG-TDPP), TDPP (TDPP-3TEG-TDPP) and naphthalene diimide (PNDITEG-TDPP). BBT-3TEG-TDPP and PNDITEG-TDPP showed highest dielectric constants (~ 5) at 1MHz frequency suggesting efficient contribution of dipolar polarization from TEG side-chains. To understand the electronic contribution of the polymer backbone and the polarity of TEG side-chains, and the resulting enhancement of the dielectric constant, we further performed first-principles density functional theory calculations. Single-component organic solar cells (OSC) fabricated utilizing these polymers resulted in poor performance which is attributed to the absence of free charge generation. Furthermore, transient absorption spectroscopy studies show low exciton diffusion length as observed in donor-acceptor type conjugated polymers. Our results suggest that, the strategy of enhancing dielectric constant with polar side-chains is not sufficient to reduce Coulombic interaction between hole and electron in OSCs. </p> </div> </div> </div>

Synthesis and photochemical reaction of polystyrenes with pendant donor–acceptor type norbornadienes containing carbamoyl chromophores

2003 ◽  
Vol 55 (1) ◽  
pp. 75-88 ◽  
Author(s):  
Naoyuki Kawashima ◽  
Atsushi Kameyama ◽  
Tadatomi Nishikubo ◽  
Takabumi Nagai
Keyword(s):  
Photochemical Reaction ◽  
Donor Acceptor

Tristriazolotriazines with π-Conjugated Segments: Star-Shaped Fluorophors and Discotic Liquid Crystals

2012 ◽  
Vol 77 ◽  
pp. 118-123 ◽  
Author(s):  
Stefan Glang ◽  
Dorothee Borchmann ◽  
Thorsten Rieth ◽  
Heiner Detert
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Liquid Crystals ◽  
Cyanuric Chloride ◽  
Side Chains ◽  
Discotic Liquid Crystals ◽  
Ring Transformation ◽  
Non Linear ◽  
Donor Acceptor ◽  
Linear Optical Properties

C3-symmetrical tristriazolotriazines substituted with phenylene rings carrying lateral flexible alkoxy side chains were prepared via condensation/ring transformation of cyanuric chloride and tetrazoles. These star-shaped, planar compounds can form broad thermotropic mesophases. Due to the extensive π-conjugation, these compounds are highly emissive and the octupolar donor-acceptor electronic structure results in non-linear optical properties like solvatochromism. Brønstedt acids provoke halochromism of the absorption and of the fluorescence.

Tuning the Light Absorption of Donor–Acceptor Conjugated Polymers: Effects of Side Chains and ‘Spacer' Units in Thieno[3,4-b]pyrazine-Fluorene Copolymers

2015 ◽  
Vol 68 (11) ◽  
pp. 1759 ◽  
Author(s):  
Michael E. Mulholland ◽  
Kristine L. Konkol ◽  
Trent E. Anderson ◽  
Ryan L. Schwiderski ◽  
Seth C. Rasmussen
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Material Properties ◽  
Light Absorption ◽  
Photovoltaic Device ◽  
Electrochemical Characterization ◽  
Side Chains ◽  
Electronic And Optical Properties ◽  
Donor Acceptor

Four donor–acceptor (D-A) copolymers of 2,3-difunctionalized thieno[3,4-b]pyrazine (TP) and 9,9-dioctylfluorene were prepared in order to illustrate the ability to tune the electronic and optical properties of TP-based D-A polymers by the choice of side chains on the TP unit. In addition, analogous polymers were prepared with and without thiophene spacer units in order to allow discussion of their effect on the material properties. This combination of effects allowed tuning of the band gap over the range of 1.6–2.1 eV. Full optical and electrochemical characterization is reported for all materials, as well as initial photovoltaic device data for representative materials.

Thiophene–Vinylene–Thiophene-Based Donor–Acceptor Copolymers with Acetylene-Inserted Branched Alkyl Side Chains To Achieve High Field-Effect Mobilities

2018 ◽  
Vol 30 (21) ◽  
pp. 7611-7622 ◽  
Author(s):  
De-Yang Chiou ◽  
Yen-Chen Su ◽  
Kai-En Hung ◽  
Jhih-Yang Hsu ◽  
Tze-Gang Hsu ◽  
...  
Keyword(s):  
Field Effect ◽  
High Field ◽  
Side Chains ◽  
Alkyl Side Chains ◽  
Donor Acceptor

Influence of side chains on electrochromic properties of green donor–acceptor–donor polymers

2011 ◽  
Vol 56 (10) ◽  
pp. 3454-3459 ◽  
Author(s):  
Stefan Hellström ◽  
Tianqi Cai ◽  
Olle Inganäs ◽  
Mats R. Andersson
Keyword(s):  
Side Chains ◽  
Electrochromic Properties ◽  
Donor Acceptor
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