Synthesis and characterization of novel low-bandgap triphenylamine-based conjugated polymers with main-chain donors and pendent acceptors for organic photovoltaics

We have synthesized a series of carbazole-benzothiadiazole-triazole based copolymers, poly[(N-9′-heptadecanyl-2,7-carbazole)-co-(5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole))-co-((4-(4-butylphenyl)-3,5-diphenyl-4H-1,2,4]triazole))] (PCz3TBTz) by Suzuki coupling polymerization. The optical and electrochemical properties of the copolymers could be tuned by changing the comonomer unit of triazole from 0% to 80%. Organic photovoltaic (OPV) cells were fabricated by blending the synthesized polymers as a donor and PCBM as an acceptor. The material solubility and film morphology were improved by introducing the triazole unit in the main chain. Improved OPV device performance of 1.74% was achieved in the presence of an optimal amount of triazole moieties.

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Synthesis and Characterization of Soluble Conjugated Poly(p-phenylenevinylene) Derivatives Constituted of Alternating Pyrazole and 1,3,4-Oxadiazole Moieties

Australian Journal of Chemistry ◽

10.1071/ch08344 ◽

2009 ◽

Vol 62 (10) ◽

pp. 1355 ◽

Cited By ~ 4

Author(s):

En-Ming Chang ◽

Shin-Lin Huang ◽

Cheng-Tien Lee ◽

Hui-Chang Lin ◽

Chun-Yen Chen ◽

...

Keyword(s):

Conjugated Polymers ◽

Main Chain ◽

Synthesis And Characterization ◽

Heck Coupling ◽

Soluble Polymers ◽

Molecular Weights ◽

Irreversible Reduction ◽

Pl Emission ◽

20 Nm

New soluble poly(p-phenylenevinylene) derivatives with 1,3,4-oxadiazole and pyrazole rings along the main chain were synthesized by Heck coupling. The new conjugated polymers are soluble in common organic solvents as a result of the fully conjugated backbone with dodecyloxy side groups. The polymers show relatively high glass-transition temperatures (up to 160°C) and good satisfactory thermal stability. Solutions of the polymers emit blue-greenish light with photoluminescence (PL) emission maxima around 490–500 nm. The PL spectrum of the polymer’s thin films, with a maximum at 515 nm, shows a red-shift (~20 nm), with respect to the solution spectrum. Cyclic voltammetry reveals that both conjugated polymers have reversible oxidation and irreversible reduction, making them n-type electroluminescent materials. The electron affinity of the new polymers was estimated as 2.73–2.74 eV. The weight-average molecular weights (M w) of the new soluble polymers were in the range of 4790–4950.

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Synthesis and characterization of new π-conjugated polymers containing 1,8-naphthyridine in the main chain: Role of the 1,8-naphthyridine unit in π-conjugated polymers

Journal of Polymer Science Part A Polymer Chemistry ◽

10.1002/pola.24862 ◽

2011 ◽

Vol 49 (19) ◽

pp. 4204-4212 ◽

Cited By ~ 1

Author(s):

Take-Aki Koizumi ◽

Shinichirou Kato ◽

Takakazu Yamamoto

Keyword(s):

Conjugated Polymers ◽

Main Chain ◽

Synthesis And Characterization

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Synthesis and characterization of an electron-deficient conjugated polymer based on pyridine-flanked diketopyrrolopyrrole

RSC Advances ◽

10.1039/d1ra00779c ◽

2021 ◽

Vol 11 (21) ◽

pp. 12995-13003

Author(s):

Jialin Yang ◽

Li Yang ◽

Qianqian Chen ◽

Keke Guo ◽

Ji-Min Han

Keyword(s):

Conjugated Polymers ◽

Electrochemical Properties ◽

Conjugated Polymer ◽

Synthesis And Characterization

We report a pyridine-flanked diketopyrrolopyrrole monomer and all-acceptor conjugated polymers synthesized therefrom. Photophysical, thermal and electrochemical properties of the polymers have been determined.

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