scholarly journals Development of a quantum chemical descriptor expressing aromatic/quinoidal character for designing narrow-bandgap π-conjugated polymers

2019 ◽  
Vol 10 (41) ◽  
pp. 5584-5593 ◽  
Author(s):  
Yoshihiro Hayashi ◽  
Susumu Kawauchi
Keyword(s):  
Conjugated Polymers ◽  
Quantum Chemical ◽  
Quantum Chemical Descriptor ◽  
Chemical Descriptor ◽  
Narrow Bandgap

Guidance for designing narrow-bandgap copolymers was established by developing a chemical descriptor (QSE) that considers only the monomer and linking sites.

Methoxylation of quinoidal bithiophene as a single regioisomer building block for narrow-bandgap conjugated polymers and high-performance organic field-effect transistors

2020 ◽  
Vol 8 (43) ◽  
pp. 15168-15174 ◽  
Author(s):  
Yunlong Sun ◽  
Yunpeng Zhang ◽  
Yang Ran ◽  
Longxian Shi ◽  
Qingsong Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Building Block ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Hole Mobility ◽  
Methoxyl Group ◽  
Organic Field Effect Transistors ◽  
Narrow Bandgap

Methoxyl group was introduced to obtain isomer-free methoxylation quinoidal bithiophene building block. Four polymers displayed narrow bandgap (<1.20 eV) and hole mobility of up to 2.70 cm2 V−1 s−1.

Electronic Structure and Optical Response of Electroluminescent Conjugated Polymers

1997 ◽  
Vol 488 ◽  
Author(s):  
J. L. Bredas ◽  
J. Cornil ◽  
D. Beljonne ◽  
D. A. Dos Santos ◽  
Z. Shuaiv ◽  
...  
Keyword(s):  
Experimental Data ◽  
Optical Properties ◽  
Electronic Structure ◽  
Quantum Yield ◽  
Conjugated Polymers ◽  
Quantum Chemical Calculations ◽  
Theoretical Approach ◽  
Quantum Chemical ◽  
Fluorescence Quantum Yield ◽  
Remarkable Agreement

AbstractIn this contribution, we investigate by means of correlated quantum-chemical calculations the influence of intermolecular interactions on the absorption and emission properties of conjugated chains. Various strategies are suggested to avoid a substantial decrease in fluorescence quantum yield in condensed media. Finally, the reliability of our theoretical approach is validated by showing the remarkable agreement obtained between the experimental data and the calculated optical properties of clusters formed by sexithienyl molecules.

scholarly journals Recent Development on Narrow Bandgap Conjugated Polymers for Polymer Solar Cells

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 39 ◽  
Author(s):  
Yueyue Gao ◽  
Ming Liu ◽  
Yong Zhang ◽  
Zhitian Liu ◽  
Yulin Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Polymer Solar Cells ◽  
Narrow Bandgap

Electroluminescence in Semiconducting Conjugated Polymers and Oligomers: A Quantum-chemical Perspective

1999 ◽  
Vol 44 (3-4) ◽  
pp. 341-355 ◽  
Author(s):  
J. L. Brédas ◽  
D. Beljonne ◽  
J. Cornil ◽  
D. A. Dos Santos
Keyword(s):  
Conjugated Polymers ◽  
Quantum Chemical

scholarly journals Effect of chiral 2-ethylhexyl side chains on chiroptical properties of the narrow bandgap conjugated polymers PCPDTBT and PCDTPT

2016 ◽  
Vol 7 (8) ◽  
pp. 5313-5321 ◽  
Author(s):  
Stephanie L. Fronk ◽  
Ming Wang ◽  
Michael Ford ◽  
Jessica Coughlin ◽  
Cheng-Kang Mai ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Side Chains ◽  
Chiroptical Properties ◽  
Narrow Bandgap

PCPDTBT* and PCDTPT* containing chiral 2-ethylhexyl side chains were synthesized and their resulting chiroptical properties were studied. PCPDTBT* exhibits a stronger chiroptical response compared to PCDTPT*.

An ultra-narrow bandgap derived from thienoisoindigo polymers: structural influence on reducing the bandgap and self-organization

2016 ◽  
Vol 7 (5) ◽  
pp. 1181-1190 ◽  
Author(s):  
Tsukasa Hasegawa ◽  
Minoru Ashizawa ◽  
Junya Hiyoshi ◽  
Susumu Kawauchi ◽  
Jianguo Mei ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Self Organization ◽  
Narrow Bandgap ◽  
Structural Influence

Six conjugated polymers based on thienoisoindigo (TII) and thiophene-flanked diketopyrrolopyrrole (TDPP) units bearing either branched-alkyl or siloxane-terminated alkyl solubilizing groups have been synthesized.

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