scholarly journals Enhanced Thermoelectric Performance of Indacenodithiophene-Benzothiadiazole Copolymer Containing Polar Side Chains and Single Wall Carbon Nanotubes Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 848
Author(s):  
Zhongming Chen ◽  
Tongchao Liu ◽  
Chengjun Pan ◽  
Guiping Tan
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymers ◽  
Power Factor ◽  
Filler Content ◽  
Composite Films ◽  
Thermoelectric Performance ◽  
Single Wall Carbon Nanotubes ◽  
Side Chains ◽  
Single Wall Carbon ◽  
Maximum Power Factor

Composite films of indacenodithiophene-bezothiadazole copolymers bearing polar side chains (P1) and single wall carbon nanotubes (SWCNTs) are found to show a competitive thermoelectric performance compared to their analogous polymers with aliphatic side chains (P2). The enhanced power factors could be attributed to the stronger interfacial interactions between the P1/SWCNTs compared to that of P2/SWCNTs containing the same ratio of SWCNTs. A maximum power factor of 161.34 μW m−1 K−2 was obtained for the composite films of P1/SWCNTs for a filler content of 50 wt%, which is higher than that of P2/SWCNTs (139.06 μW m−1 K−2, 50 wt%). Our work sheds light on the design of side-chains in efficient conjugated polymers/SWCNTs thermoelectric materials and contributes to the understanding of their thermoelectric properties.

scholarly journals Backbone Effects on the Thermoelectric Properties of Ultra-Small Bandgap Conjugated Polymers

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2486
Author(s):  
Dexun Xie ◽  
Jing Xiao ◽  
Quanwei Li ◽  
Tongchao Liu ◽  
Jinjia Xu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Power Factor ◽  
Carrier Mobility ◽  
Polymeric Materials ◽  
Thermoelectric Performance ◽  
Organic Thermoelectric Materials ◽  
Higher Power ◽  
Donor Acceptor ◽  
Maximum Power Factor ◽  
Higher Carrier Mobility

Conjugated polymers with narrower bandgaps usually induce higher carrier mobility, which is vital for the improved thermoelectric performance of polymeric materials. Herein, two indacenodithiophene (IDT) based donor–acceptor (D-A) conjugated polymers (PIDT-BBT and PIDTT-BBT) were designed and synthesized, both of which exhibited low-bandgaps. PIDTT-BBT showed a more planar backbone and carrier mobility that was two orders of magnitude higher (2.74 × 10−2 cm2V−1s−1) than that of PIDT-BBT (4.52 × 10−4 cm2V−1s−1). Both exhibited excellent thermoelectric performance after doping with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, where PIDTT-BBT exhibited a larger conductivity (0.181 S cm−1) and a higher power factor (1.861 μW m−1 K−2) due to its higher carrier mobility. The maximum power factor of PIDTT-BBT reached 4.04 μW m−1 K−2 at 382 K. It is believed that conjugated polymers with a low bandgap are promising in the field of organic thermoelectric materials.

Matrix mediated alignment of single wall carbon nanotubes in polymer composite films

Polymer ◽  
2006 ◽  
Vol 47 (11) ◽  
pp. 3915-3921 ◽  
Author(s):  
V.N. Bliznyuk ◽  
S. Singamaneni ◽  
R.L. Sanford ◽  
D. Chiappetta ◽  
B. Crooker ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Composite ◽  
Composite Films ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

scholarly journals Improvement of thermoelectric performance of single-wall carbon nanotubes by heavy doping: Effect of one-dimensional band multiplicity

2016 ◽  
Vol 9 (12) ◽  
pp. 125103 ◽  
Author(s):  
Daisuke Hayashi ◽  
Yusuke Nakai ◽  
Haruka Kyakuno ◽  
Takahiro Yamamoto ◽  
Yasumitsu Miyata ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Performance ◽  
Doping Effect ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
One Dimensional ◽  
Heavy Doping

scholarly journals Flexible thermoelectric films formed using integrated nanocomposites with single-wall carbon nanotubes and Bi2Te3 nanoplates via solvothermal synthesis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hayato Yabuki ◽  
Susumu Yonezawa ◽  
Rikuo Eguchi ◽  
Masayuki Takashiri
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Nanocomposite Films ◽  
Single Wall Carbon Nanotubes ◽  
High Electrical Conductivity ◽  
Single Wall Carbon ◽  
Maximum Power Factor ◽  
Flexible Thermoelectric

Abstract Single-wall carbon nanotubes (SWCNTs) and Bi2Te3 nanoplates are very promising thermoelectric materials for energy harvesting. When these two materials are combined, the resulting nanocomposites exhibit high thermoelectric performance and excellent flexibility. However, simple mixing of these materials is not effective in realizing high performance. Therefore, we fabricated integrated nanocomposites by adding SWCNTs during solvothermal synthesis for the crystallization of Bi2Te3 nanoplates and prepared flexible integrated nanocomposite films by drop-casting. The integrated nanocomposite films exhibited high electrical conductivity and an n-type Seebeck coefficient owing to the low contact resistance between the nanoplates and SWCNTs. The maximum power factor was 1.38 μW/(cm K2), which was 23 times higher than that of a simple nanocomposite film formed by mixing SWCNTs during drop-casting, but excluding solvothermal synthesis. Moreover, the integrated nanocomposite films maintained their thermoelectric properties through 500 bending cycles.

Arginine Side Chains as a Dispersant for Individual Single-Wall Carbon Nanotubes

2014 ◽  
Vol 20 (17) ◽  
pp. 4922-4930 ◽  
Author(s):  
Atsushi Hirano ◽  
Takeshi Tanaka ◽  
Hiromichi Kataura ◽  
Tomoshi Kameda
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Side Chains ◽  
Single Wall Carbon

scholarly journals Thin Graphene–Nanotube Films for Electronic and Photovoltaic Devices: DFTB Modeling

Membranes ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 341
Author(s):  
Dmitry A. Kolosov ◽  
Vadim V. Mitrofanov ◽  
Michael M. Slepchenkov ◽  
Olga E. Glukhova
Keyword(s):  
Carbon Nanotubes ◽  
Absorption Spectrum ◽  
Energy Gap ◽  
Composite Films ◽  
Single Wall Carbon Nanotubes ◽  
Photovoltaic Devices ◽  
Optical Range ◽  
Single Wall Carbon ◽  
Wide Range ◽  
Irregular Arrangement

Supercell atomic models of composite films on the basis of graphene and single-wall carbon nanotubes (SWCNTs) with an irregular arrangement of SWCNTs were built. It is revealed that composite films of this type have a semiconducting type of conductivity and are characterized by the presence of an energy gap of 0.43–0.73 eV. It was found that the absorption spectrum of composite films contained specific peaks in a wide range of visible and infrared (IR) wavelengths. On the basis of calculated composite films volt-ampere characteristics (VAC), the dependence of the current flowing through the films on the distance between the nanotubes was identified. For the investigated composites, spectral dependences of the photocurrent were calculated. It was shown that depending on the distance between nanotubes, the maximum photocurrent might shift from the IR to the optical range.

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