Synthesis and Photovoltaic Properties of Copolymers Based on Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene and Thiophene with Different Conjugated Side Groups

Gu, Zhaojie; Tang, Peng; Zhao, Bin; Luo, Hao; Guo, Xia; Chen, Huajie; Yu, Gui; Liu, Xinping; Shen, Ping; Tan, Songting

doi:10.1021/ma202399n

Cited by 49 publications

(35 citation statements)

References 40 publications

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“…3-Octyl-5-(7-(4-octylthiophen-2-yl)benzo[c] [1,2,5]thiadiazol-4-yl)thiophene-2-carbaldehyde (Compound 1) [37], (4-(bis(4-bromophenyl)amino)benzyl)diethylphosphine oxide (Compound 2) [38], 5,10-bis(4-octylthiophen-2-yl)naphtho[1,2-c:5,6-c′]bis( [1,2,5]thiadiazole) (Compound 3) [32], 2,2′-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (M3) [39], and 9-(heptadecan-9-yl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H -carbazole (M4) [22] were synthesized according to literature procedures.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of two-dimensional π-conjugated polymers pendent with benzothiadiazole and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole moieties for polymer solar cells

Liu

et al. 2015

Sci. China Chem.

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Four new 2D donor-acceptor conjugated polymers were designed and synthesized. These new polymers comprised fluorenealt-triphenylamine or carbazole-alt-triphenylamine as the backbones, and pendants with 2,1,3-benzothiadiazole (BT) or naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole (NT) in a triphenylamine unit as the side groups. By changing the acceptor BT for a stronger electron-withdrawing unit of NT moiety in the side chain, the energy levels, absorption spectra, band gaps, and charge-transport abilities of the resultant polymers could be effectively tuned. Bulk heterojunction solar cells with these polymers as the electron donors and (6,6)-phenyl-C71-butyric acid methyl ester as the electron acceptor exhibited high open-circuit voltage (more than 0.8 eV). The power conversion efficiency can be improved from 1.37% to 3.52% by replacing the BT with an NT moiety, which indicates that introducing NT as the side-chain building block can be an effective strategy to construct efficient 2D conjugated polymers for PSCs. two-dimensional conjugated polymer, benzothiadiazole, naphthobisthiadiazole, bulkheterojunction, polymer solar cell

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Section: Methodsmentioning

confidence: 99%

Synthesis of two-dimensional π-conjugated polymers pendent with benzothiadiazole and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole moieties for polymer solar cells

Liu

et al. 2015

Sci. China Chem.

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“…To increase the absorption range of BDT copolymer with thiophene, different electron-deficient units such as conjugated 1,3-indanedione (ID) and 4,7-dithien-5-yl-2,1,3-benzodiathiazole (DTBT) were introduced as side chains to obtain P70 and P71, respectively. The side conjugation lower the HOMO level and the bulk heterojunction solar cell prepared with these polymers with PC 61 BM gave a PCE of 2.48% and 4.18% for P70 and P71, respectively [70] (see Figs. 6 and 7).…”

Section: Thienylvinylene Based Polymersmentioning

confidence: 99%

Polymer design for solar cell – Current trend and future scenario

Hemavathi

Ahipa

Pai

2015

European Polymer Journal

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“…By changing different side groups, energy levels and band gaps of the resulted copolymers could be effectively tuned. P134 exhibited a broader absorption spectra in a region of 300-750 nm, while P133 presented the best photovoltaic performance of 4.18 % [114].…”

Section: Conjugated Polymers With Pendant D-a Side Chainsmentioning

confidence: 99%

Donor Materials for Organic Solar Cell (OSC)

Song

2014

Organic and Hybrid Solar Cells

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In the past 10 years, the highest efficiency obtained from organic photovoltaics (OPVs), such as bulk heterojunction (BHJ) polymer solar cells (PSCs), has risen from 2.5 to 11 %, while the solution-processed small molecule (SM) BHJ solar cells arrived at competitive level of 10 %. This rapid progress was achieved by the development of both materials synthesis and device fabrication. With the better understanding of the mechanism of the photon-to-electron conversion process in OPV, the commercialization of PSCs could be realized soon. Nowadays, a lot of efforts have been devoted to developing of new donor, acceptor, and interfacial layer materials, optimizing nanostructures of the active layer, fabricating new device architectures, and so on.The development of new donor materials for PSCs is one of the most popular research topics in the field of PSCs and many excellent results have been published. A variety of polymers and SMs have been reported as donor materials for OPVs and some of them might be candidates for the commercialization later. From the reported structures, the conjugated backbones of polymers for OPV can be arbitrarily classified into a few categories based on the constitution of the repeating unit, namely, (a) homopolymers, (b) donor-acceptor polymers, (c) quinoid polymers, and (d) other types of polymers; whereas the SM donors can be classified into the following categories based on their main structures, (a) donor-acceptor type molecules, (b) squaraine dyes, and (c) oligomer and dendrimers.

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Synthesis and Photovoltaic Properties of Copolymers Based on Benzo[1,2-b:4,5-b′]dithiophene and Thiophene with Different Conjugated Side Groups

Cited by 49 publications

References 40 publications

Synthesis of two-dimensional π-conjugated polymers pendent with benzothiadiazole and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole moieties for polymer solar cells

Synthesis of two-dimensional π-conjugated polymers pendent with benzothiadiazole and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole moieties for polymer solar cells

Polymer design for solar cell – Current trend and future scenario

Donor Materials for Organic Solar Cell (OSC)

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