Synthesis and characterization of alternating and random conjugated polymers derived from dithieno[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b′]dithiophene and 2,1,3-benzothiadiazole derivatives

Su, Qiang; Tong, Junfeng; Li, Jianfeng; Zhang, Peng; Yang, Chunyan; Zhang, Caizhen; Wang, Rui; Chen, Dejia

doi:10.1038/pj.2015.74

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…This often leads to changes in the spectral absorption and adjustments in the HOMO which, in-turn, influence the short circuit current (Jsc) voltage (Voc), respectively. [20][21][22][23] The nanocrystalline morphologies sometimes found in statistical copolymers have been shown to hinder charge extraction and decrease Jsc. 24,22,25 The tendency of statistical copolymers to aggregate less than their alternating counterparts can, however, be advantageous, leading to materials which are more readily soluble and easier to process.…”

Section: Introductionmentioning

confidence: 99%

Determining the sequence and backbone structure of “semi-statistical” copolymers as donor–acceptor polymers in organic solar cells

Lawton

Warr

Perdigão

et al. 2020

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Determining the sequence and backbone structure of “semi-statistical” copolymers as donor–acceptor polymers in organic solar cells

Lawton

Warr

Perdigão

et al. 2020

Sustainable Energy Fuels

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“…BDT moiety was chosen as the investigation candidate owing to the planarity of the BDT backbone which was confirmed to show good charge carrier mobility [ 33 , 34 , 35 ]. The thiophene-benzothiadiazole-thiophene was chosen as the comonomer to build the donor–acceptor skeleton of the conjugated backbone.…”

Section: Resultsmentioning

confidence: 99%

“…The incorporation of the two-dimensional conjugated side-chain to the polymer backbone was confirmed to improve the electrical conductivity of conjugated polymers [ 31 , 32 , 33 ], thus was widely used as the active layers in the organic-field effect transistors (OFETs) and organic solar cells (OSCs) [ 34 , 35 ]. Recently, we attempted to investigate the thermoelectric performance of BDT-based polymers with two-dimensional conjugated side-chains [ 36 ] and obtained good thermoelectric power factor of 101.3 μWm −1 K −2 , which is almost 100 times larger than that of the BDT–EDOT copolymers with one dimensional aliphatic side chain (0.9 μWm −1 K −2 ).…”

Section: Introductionmentioning

confidence: 99%

Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping

et al. 2020

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In this study, a benzodithiophene (BDT)-based donor (D)–acceptor (A) polymer containing carbazole segment in the side-chain was designed and synthesized and the thermoelectric composites with 50 wt % of single walled carbon nanotubes (SWCNTs) were prepared via ultrasonication method. Strong interfacial interactions existed in both of the composites before and after immersing into the 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) solution as confirmed by UV-Vis-NIR, Raman, XRD and SEM characterizations. After doping the composites by F4TCNQ, the electrical conductivity of the composites increased from 120.32 S cm−1 to 1044.92 S cm−1 in the room temperature. With increasing the temperature, the electrical conductivities and Seebeck coefficients of the undoped composites both decreased significantly for the composites; the power factor at 475 K was only 6.8 μW m−1 K−2, which was about nine times smaller than the power factor at room temperature (55.9 μW m−1 K−2). In the case of doped composites, although the electrical conductivity was deceased from 1044.9 S cm−1 to 504.17 S cm−1, the Seebeck coefficient increased from 23.76 μV K−1 to 35.69 μW m−1 K−2, therefore, the power factors of the doped composites were almost no change with heating the composite films.

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“…Benzodithiophene (BDT) is one of the most widely used structural units for donor polymers in PSCs because of its rigid and large planar structure [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Recently, side chains of BDT-containing conjugated polymers have been found to play a critical role in affecting polymer packing and bulk heterojunction (BHJ) morphology.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Photovoltaic Properties of 2D-Conjugated Polymers Based on Alkylthiothienyl-Substituted Benzodithiophene and Different Accepting Units

Wang

Cheng

et al. 2018

Polymers

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Abstract:Two new low bandgap conjugated polymers, PBDTS-ID and PBDTS-DTNT, containing isoindigo (ID) and naphtho [1,2-c:5,6-c ]bis[1,2,5]thiadiazole (NT), respectively, as an electron-deficient unit and alkylthiothienyl-substituted benzodithiophene (BDTS) as an electron-rich unit, were designed and synthesized by palladium-catalyzed Stille polycondensation. Both polymers showed good thermal stability up to 330 • C and broad absorption ranging from 300 to 842 nm. Electrochemical measurement revealed that PBDTS-ID and PBDTS-DTNT exhibited relatively low-lying highest occupied molecular orbital energy levels at −5.40 and −5.24 eV, respectively. These features might be beneficial for obtaining reasonable high open-circuit voltage and high short-circuit current. Polymer solar cells (PSCs) were fabricated with an inverted structure of indium-tin oxide/poly(ethylenimine ethoxylate)/polymer:PC 71 BM/MoO 3 /Ag. As a preliminary result, the PSCs based on PBDTS-ID and PBDTS-DTNT exhibited moderate power conversion efficiencies of 2.70% and 2.71%, respectively.

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Synthesis and characterization of alternating and random conjugated polymers derived from dithieno[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b′]dithiophene and 2,1,3-benzothiadiazole derivatives

Cited by 8 publications

References 48 publications

Determining the sequence and backbone structure of “semi-statistical” copolymers as donor–acceptor polymers in organic solar cells

Determining the sequence and backbone structure of “semi-statistical” copolymers as donor–acceptor polymers in organic solar cells

Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping

Synthesis and Photovoltaic Properties of 2D-Conjugated Polymers Based on Alkylthiothienyl-Substituted Benzodithiophene and Different Accepting Units

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