scholarly journals Effect of Side Chain Substituent Volume on Thermoelectric Properties of IDT-Based Conjugated Polymers

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 963
Author(s):  
De-Xun Xie ◽  
Tong-Chao Liu ◽  
Jing Xiao ◽  
Jing-Kun Fang ◽  
Cheng-Jun Pan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Properties ◽  
Conjugated Polymer ◽  
High Performance ◽  
Charge Carriers ◽  
Side Chain ◽  
Side Chains ◽  
Bulky Substituent ◽  
P Type

A p-type thermoelectric conjugated polymer based on indacenodithiophene and benzothiadiazole is designed and synthesized by replacing normal aliphatic side chains (P1) with conjugated aromatic benzene substituents (P2). The introduced bulky substituent on P2 is detrimental to form the intensified packing of polymers, therefore, it hinders the efficient transporting of the charge carriers, eventually resulting in a lower conductivity compared to that of the polymers bearing aliphatic side chains (P1). These results reveal that the modification of side chains on conjugated polymers is crucial to rationally designed thermoelectric polymers with high performance.

The role of conjugated side chains in high performance photovoltaic polymers

2015 ◽  
Vol 3 (6) ◽  
pp. 2802-2814 ◽  
Author(s):  
Meng Wang ◽  
Di Ma ◽  
Keli Shi ◽  
Shaowei Shi ◽  
Song Chen ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
High Performance ◽  
Side Chain ◽  
Side Chains ◽  
Photovoltaic Properties

Four new D–A type copolymers, namely, PBDT-DFQX-PP, PBDT-DFQX-TP, PBDT-DFQX-PT and PBDT-DFQX-TT, were designed and synthesized to investigate the influence of conjugated side chain pattern on photovoltaic properties of conjugated polymers.

A study of the thermoelectric properties of benzo[1,2-b:4,5-b′]dithiophene–based donor–acceptor conjugated polymers

2018 ◽  
Vol 9 (35) ◽  
pp. 4440-4447 ◽  
Author(s):  
Luhai Wang ◽  
Chengjun Pan ◽  
Zhongming Chen ◽  
Xiaoyan Zhou ◽  
Chunmei Gao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Side Chains ◽  
Organic Thermoelectric Materials ◽  
Donor Acceptor

Three benzo[1,2-b:4,5-b′]dithiophene (BDT)-based donor–acceptor (D–A) conjugated polymers with different side chains were designed, synthesized, and investigated as organic thermoelectric materials.

Structure Design for High Performance n-Type Polymer Thermoelectric Materials

2021 ◽  
Author(s):  
Qi Zhang ◽  
Hengda Sun ◽  
Meifang Zhu
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Waste Heat ◽  
Building Blocks ◽  
Structure Design ◽  
Potential Candidate ◽  
Polymer Backbone ◽  
P Type ◽  
Polymer Thermoelectric

Abstract Organic thermoelectric (OTE) materials have been regarded as a potential candidate to harvest waste heat from complex, low temperature surfaces of objects and convert it into electricity. Recently, n-type conjugated polymers as organic thermoelectric materials have aroused intensive research in order to improve their performance to match up with their p-type counterpart. In this review, we discuss aspects that affect the performance of n-type OTEs, and further focus on the effect of planarity of backbone on doping efficiency and eventually the TE performance. We then summarize strategies such as implementing rigid n-type polymer backbone or modifying conventional polymer building blocks for more planar conformation. In the outlook part, we conclude forementioned devotions and point out new possibility that may promote the future development of this field.

High-performance near-infrared organic phototransistors based on diketopyrrolopyrrole conjugated polymers with partial removal of long branched alkyl side chains

2020 ◽  
Vol 8 (47) ◽  
pp. 16915-16922
Author(s):  
Yu Tang ◽  
Weijie Ge ◽  
Ping Deng ◽  
Qiaoming Zhang ◽  
Yingjie Liao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
High Performance ◽  
Near Infrared ◽  
Side Chains ◽  
Partial Removal ◽  
Nir Absorption ◽  
Alkyl Side Chains

Near-infrared (NIR) phototransistors based on diketopyrrolopyrrole polymers with partial removal of side chains are reported with improved NIR photoresponses, which take advantage of both strengthened NIR absorption and improved charge transport.

Side-chain engineering of conjugated polymers toward highly efficient near-infrared organic photo-detectors via morphology and dark current management

2020 ◽  
Vol 8 (23) ◽  
pp. 7765-7771
Author(s):  
Yeongkwon Kang ◽  
Hyeong Ju Eun ◽  
Hyojin Kye ◽  
Dahee Kim ◽  
Junseok Heo ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Dark Current ◽  
Conjugated Polymer ◽  
Near Infrared ◽  
Side Chain ◽  
Current Management ◽  
Highly Efficient ◽  
Photo Detectors

A side-chain engineered conjugated polymer provides outstanding NIR detectivity exceeding 2.0 × 1012Jones, due to enhanced photo-responsivity and suppressed dark current.

Synergy strategy to the flexible alkyl and chloride side-chain engineered quinoxaline-based D–A conjugated polymers for efficient non-fullerene polymer solar cells

2021 ◽  
Author(s):  
Liang Zeng ◽  
Ruijie Ma ◽  
Qiang Zhang ◽  
Tao Liu ◽  
Yiqun Xiao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Halogen Atom ◽  
Polymer Solar Cells ◽  
Fine Tuning ◽  
Side Chain ◽  
Side Chains

We are developing both copolymers with quinoxaline (Qx) as acceptor units by fine tuning the side chains with halogen atom chlorine (Cl) and flexible alkyl engineering for efficient non-fullerene polymer solar cells.

scholarly journals Controlled steric selectivity in molecular doping towards closest-packed supramolecular conductors

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Shinya Kohno ◽  
Yu Yamashita ◽  
Naotaka Kasuya ◽  
Tsubasa Mikie ◽  
Itaru Osaka ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Steric Effects ◽  
Side Chain ◽  
Side Chains ◽  
Void Space ◽  
Alkyl Side Chains ◽  
Recent Developments ◽  
High Carrier ◽  
Molecular Doping ◽  
Steric Selectivity

Abstract Recent developments in molecular doping technologies allow extremely high carrier densities in polymeric semiconductors, exhibiting great diversity because of the unique size, conformation, and steric effect of molecular dopants. However, it is controversial how steric effects can limit the doping efficiency and to what extent dopants can be accommodated in polymers. Here, we employ two distinct conjugated polymers with different alkyl side-chain densities, where polymers are doped via anion-change, allowing greater variation in the incorporation of molecular dopants having different electrostatic potentials and shapes. We characterize the doping efficiency with regard to steric effects, considering the unique void space in the conjugated polymers. Our study reveals that doping efficiency of polymers with sparse alkyl side-chains is significantly greater than that with dense side-chains. A closest-packed supramolecule is realized with a particular combination of a sparse polymer and a large dopant, giving rise to high conductivity, air stability, and remarkably high work function. This work provides a critical insight into overcoming steric effects in molecular doping.

Polar Side Chain Effects on the Thermoelectric Properties of Benzo[1,2‐b:4,5‐b′]Dithiophene‐Based Conjugated Polymers

2019 ◽  
Vol 40 (12) ◽  
pp. 1900082 ◽  
Author(s):  
Chengjun Pan ◽  
Luhai Wang ◽  
Tongchao Liu ◽  
Xiaoyan Zhou ◽  
Tao Wan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Properties ◽  
Side Chain
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