Synthesis and photovoltaic properties of thiophene–imide-fused thiophene alternating copolymers with different alkyl side chains

It has been shown that positions and relative orientation of the alkyl side chains in the carbazole–TTBTBTT co-polymers affect significantly their optoelectronic, charge transport and photovoltaic properties.

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New alternating copolymers of fluorene and triphenylamine bearing terthiophene and acceptor groups in the side chains: Synthesis and photovoltaic properties

Polymer ◽

10.1016/j.polymer.2011.09.022 ◽

2011 ◽

Vol 52 (23) ◽

pp. 5302-5311 ◽

Cited By ~ 7

Author(s):

Shuang Li ◽

Zhicai He ◽

Aoshu Zhong ◽

Jian Yu ◽

Hongbin Wu ◽

...

Keyword(s):

Side Chains ◽

Photovoltaic Properties ◽

Alternating Copolymers

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Effect of Replacing Alkyl Side Chains with Triethylene Glycols on Photovoltaic Properties of Easily Accessible Fluorene-Based Non-Fullerene Molecular Acceptors: Improve or Deteriorate?

ACS Applied Energy Materials ◽

10.1021/acsaem.8b00012 ◽

2018 ◽

Vol 1 (3) ◽

pp. 1276-1285 ◽

Cited By ~ 5

Author(s):

Shoujie Zhang ◽

Jianhong Gao ◽

Wei Wang ◽

Chun Zhan ◽

Shengqiang Xiao ◽

...

Keyword(s):

Side Chains ◽

Photovoltaic Properties ◽

Alkyl Side Chains

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Influential effects of π-spacers, alkyl side chains, and various processing conditions on the photovoltaic properties of alkylselenyl substituted benzodithiophene based polymers

Journal of Materials Chemistry C ◽

10.1039/c4tc02092h ◽

2015 ◽

Vol 3 (4) ◽

pp. 796-808 ◽

Cited By ~ 14

Author(s):

Kakaraparthi Kranthiraja ◽

Kumarasamy Gunasekar ◽

Woosum Cho ◽

Young Geun Park ◽

Jin Yong Lee ◽

...

Keyword(s):

Collective Effects ◽

Side Chains ◽

Processing Conditions ◽

Photovoltaic Properties ◽

Alkyl Side Chains

Collective effects of π-spacers, alkyl side chains, and various processing conditions on the photovoltaic properties.

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Synthesis and characterization of benzodithiophene and benzotriazole-based polymers for photovoltaic applications

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.12.160 ◽

2016 ◽

Vol 12 ◽

pp. 1629-1637 ◽

Cited By ~ 16

Author(s):

Desta Gedefaw ◽

Marta Tessarolo ◽

Margherita Bolognesi ◽

Mario Prosa ◽

Renee Kroon ◽

...

Keyword(s):

Solar Cells ◽

Bulk Heterojunction ◽

Coupling Reaction ◽

Side Chains ◽

Photovoltaic Properties ◽

Polymer Backbone ◽

Heterojunction Solar Cells ◽

Highest Occupied Molecular Orbital ◽

Alkyl Side Chains

Two high bandgap benzodithiophene–benzotriazole-based polymers were synthesized via palladium-catalysed Stille coupling reaction. In order to compare the effect of the side chains on the opto-electronic and photovoltaic properties of the resulting polymers, the benzodithiophene monomers were substituted with either octylthienyl (PTzBDT-1) or dihexylthienyl (PTzBDT-2) as side groups, while the benzotriazole unit was maintained unaltered. The optical characterization, both in solution and thin-film, indicated that PTzBDT-1 has a red-shifted optical absorption compared to PTzBDT-2, likely due to a more planar conformation of the polymer backbone promoted by the lower content of alkyl side chains. The different aggregation in the solid state also affects the energetic properties of the polymers, resulting in a lower highest occupied molecular orbital (HOMO) for PTzBDT-1 with respect to PTzBDT-2. However, an unexpected behaviour is observed when the two polymers are used as a donor material, in combination with PC61BM as acceptor, in bulk heterojunction solar cells. Even though PTzBDT-1 showed favourable optical and electrochemical properties, the devices based on this polymer present a power conversion efficiency of 3.3%, considerably lower than the efficiency of 4.7% obtained for the analogous solar cells based on PTzBDT-2. The lower performance is presumably attributed to the limited solubility of the PTzBDT-1 in organic solvents resulting in enhanced aggregation and poor intermixing with the acceptor material in the active layer.

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Fine-tuning of polymer photovoltaic properties by the length of alkyl side chains

Chinese Journal of Polymer Science ◽

10.1007/s10118-015-1603-5 ◽

2015 ◽

Vol 33 (3) ◽

pp. 490-498 ◽

Cited By ~ 13

Author(s):

Rui-ping Qin ◽

Yu-rong Jiang ◽

Hao-xing Zhang ◽

Kai-xuan Zhang ◽

Qun-ying Zhang ◽

...

Keyword(s):

Fine Tuning ◽

Side Chains ◽

Photovoltaic Properties ◽

Alkyl Side Chains

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Synthesis of New Derivatives of BEDT-TTF: Installation of Alkyl, Ethynyl, and Metal-Binding Side Chains and Formation of Tris(BEDT-TTF) Systems

Magnetochemistry ◽

10.3390/magnetochemistry7080110 ◽

2021 ◽

Vol 7 (8) ◽

pp. 110

Author(s):

Songjie Yang ◽

Matteo Zecchini ◽

Andrew Brooks ◽

Sara Krivickas ◽

Desiree Dalligos ◽

...

Keyword(s):

Metal Binding ◽

Tricarboxylic Acid ◽

Metal Salts ◽

Side Chain ◽

Side Chains ◽

Ethynyl Group ◽

X Ray ◽

Transition Metal Salts ◽

Alkyl Side Chains ◽

Derivatives Of

The syntheses of new BEDT-TTF derivatives are described. These comprise BEDT-TTF with one ethynyl group (HC≡C-), with two (n-heptyl) or four (n-butyl) alkyl side chains, with two trans acetal (-CH(OMe)2) groups, with two trans aminomethyl (-CH2NH2) groups, and with an iminodiacetate (-CH2N(CH2CO2−)2 side chain. Three transition metal salts have been prepared from the latter donor, and their magnetic properties are reported. Three tris-donor systems are reported bearing three BEDT-TTF derivatives with ester links to a core derived from benzene-1,3,5-tricarboxylic acid. The stereochemistry and molecular structure of the donors are discussed. X-ray crystal structures of two BEDT-TTF donors are reported: one with two CH(OMe)2 groups and with one a -CH2N(CH2CO2Me)2 side chain.

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