Layered materials with 2D connectivity for thermoelectric energy conversion

2020 ◽  
Vol 8 (25) ◽  
pp. 12226-12261 ◽  
Author(s):  
Manisha Samanta ◽  
Tanmoy Ghosh ◽  
Sushmita Chandra ◽  
Kanishka Biswas
Keyword(s):  
Energy Conversion ◽  
Transport Properties ◽  
Thermoelectric Materials ◽  
State Of The Art ◽  
Layered Materials ◽  
Phonon Transport ◽  
Structure Property ◽  
Thermoelectric Energy ◽  
Structure Property Relationship ◽  
Insight Into

The present review provides an in-depth insight into the structure–property relationship focusing on the electronic and phonon transport properties of various 2D layered state-of-the-art thermoelectric materials.

scholarly journals Architectures and Applications of BODIPY-Based Conjugated Polymers

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 75
Author(s):  
Yiqi Fan ◽  
Jinjin Zhang ◽  
Zhouyi Hong ◽  
Huayu Qiu ◽  
Yang Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Chemical Doping ◽  
Structure Property ◽  
High Quantum Yield ◽  
Conjugated Materials ◽  
Energy Band Gap ◽  
Photoelectric Properties ◽  
Structure Property Relationship ◽  
Insight Into ◽  
High Absorption

Conjugated polymers generally contain conjugated backbone structures with benzene, heterocycle, double bond, or triple bond, so that they have properties similar to semiconductors and even conductors. Their energy band gap is very small and can be adjusted via chemical doping, allowing for excellent photoelectric properties. To obtain prominent conjugated materials, numerous well-designed polymer backbones have been reported, such as polyphenylenevinylene, polyphenylene acetylene, polycarbazole, and polyfluorene. 4,4′-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based conjugated polymers have also been prepared owing to its conjugated structure and intriguing optical properties, including high absorption coefficients, excellent thermal/photochemical stability, and high quantum yield. Most importantly, the properties of BODIPYs can be easily tuned by chemical modification on the dipyrromethene core, which endows the conjugated polymers with multiple functionalities. In this paper, BODIPY-based conjugated polymers are reviewed, focusing on their structures and applications. The forms of BODIPY-based conjugated polymers include linear, coiled, and porous structures, and their structure–property relationship is explored. Also, typical applications in optoelectronic materials, sensors, gas/energy storage, biotherapy, and bioimaging are presented and discussed in detail. Finally, the review provides an insight into the challenges in the development of BODIPY-based conjugated polymers.

scholarly journals Structural Comparison of Various Silkworm Silks: An Insight into the Structure–Property Relationship

2018 ◽  
Vol 19 (3) ◽  
pp. 906-917 ◽  
Author(s):  
Chengchen Guo ◽  
Jin Zhang ◽  
Jacob S. Jordan ◽  
Xungai Wang ◽  
Robert W. Henning ◽  
...  
Keyword(s):  
Structure Property ◽  
Structural Comparison ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Insight Into

Technical viewpoint on polystyrene/graphene nanocomposite

2020 ◽  
pp. 089270572090765
Author(s):  
Ayesha Kausar
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
State Of The Art ◽  
Synthetic Methods ◽  
Structure Property ◽  
Electromagnetic Interference Shielding ◽  
Graphene Nanocomposites ◽  
Structure Property Relationship ◽  
Fundamental Understanding ◽  
Graphene Nanocomposite

This review presents state-of-the-art progress in the field of polystyrene (PS)/graphene nanocomposite. Graphene is a monoatomic thick nanoallotrope of carbon. It has attracted tremendous research consideration owing to chemical functionalization aptitude and remarkable physical properties. Graphene has been used as a potential nanofiller to dramatically improve the performance of polymeric nanocomposite. PS is an important synthetic aromatic thermoplastic polymer. Graphene has been used to enhance the mechanical strength, thermal stability, electrical conductivity, and thermal conductivity of PS/graphene nanocomposite. Dispersion routes and synthetic methods of graphene and PS/graphene nanocomposite have also been reviewed. PS/graphene nanocomposites have been explored for anticorrosion, electromagnetic interference shielding, batteries, electrocatalysis, and microextraction applications. In spite of interesting developments, a lot remains to be done with regard to fundamental understanding of structure–property relationship and designing materials to operate for advanced high performance applications. This review is also concluded listing current challenges associated with processing and future perspectives of nanocomposite.

Designing Si/Si1−xGex Superlattices With Tailored Thermal Transport Properties

2008 ◽  
Author(s):  
E. S. Landry ◽  
A. J. H. McGaughey
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Transport Properties ◽  
Electrical Transport ◽  
Design Space ◽  
Phonon Transport ◽  
Atomistic Modeling ◽  
Electrical Transport Properties ◽  
Modeling Tools ◽  
Thermoelectric Energy

Si/Si1−xGex superlattices are promising candidates for thermoelectric energy conversion applications [1, 2], as the phonon transport through them can be inhibited while maintaining desirable electrical transport properties. No comprehensive experimental study has been performed to map the thermal conductivity design space accessible by Si/Ge nanocomposites. By using atomistic modeling tools, interesting areas of the design space can be identified and then further explored experimentally.

Influence of Structural Organization On Optical and Transport Properties in Organic Materials

1999 ◽  
Vol 598 ◽  
Author(s):  
J. Cornil ◽  
J.Ph. Calbert ◽  
D. Beljonne ◽  
D.A. Dos Santos ◽  
J.L. Bredas
Keyword(s):  
Transport Properties ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Structural Organization ◽  
Conjugated Oligomers ◽  
Structure Property ◽  
Chain Packing ◽  
Crystalline Phases ◽  
Structure Property Relationships ◽  
Insight Into

ABSTRACTCorrelated quantum-chemical calculations performed on supermolecular structures, i.e., on clusters made of several oligomer chains in interaction, provide insight into structure-property relationships in well-organized molecular films. This supermolecular approach is applied to crystalline phases of two prototypical conjugated oligomers and shows that variations in chain packing can lead to dramatically different optical (Davydov) splittings and carrier mobilities. Optimal chain organizations for various types of devices are discussed.

Insight into the structure–property relationship of two-dimensional lead-free halide perovskite Cs3Bi2Br9 nanocrystals under pressure

2021 ◽  
Author(s):  
Ting Geng ◽  
Shuai Wei ◽  
Wenya Zhao ◽  
Zhiwei Ma ◽  
Ruijing Fu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Band Gap ◽  
Lead Free ◽  
Two Dimensional ◽  
Structure Property ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Halide Perovskite ◽  
Relationship Of ◽  
Insight Into

Pressure-induced phase transformation and narrowed band gap of two-dimensional lead-free halide perovskite Cs3Bi2Br9 nanocrystals.

scholarly journals Insight into the strong aggregation-induced emission of low-conjugated racemic C6-unsubstituted tetrahydropyrimidines through crystal-structure–property relationship of polymorphs

2015 ◽  
Vol 6 (8) ◽  
pp. 4690-4697 ◽  
Author(s):  
Qiuhua Zhu ◽  
Yilin Zhang ◽  
Han Nie ◽  
Zujin Zhao ◽  
Shuwen Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Property ◽  
Aggregation Induced Emission ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Relationship Of ◽  
Insight Into

Racemic low-conjugated non-emissive THPs 1–3 can form highly emissive RS- and RR/SS-packing polymorphs with mixed through-bond and through-space conjugation.

scholarly journals Heat Transfer in Thermoelectric Materials and Devices

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Zhiting Tian ◽  
Sangyeop Lee ◽  
Gang Chen
Keyword(s):  
Heat Transfer ◽  
Energy Conversion ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Co2 Reduction ◽  
Potential Candidate ◽  
Power Generators ◽  
Air Conditioners ◽  
Thermoelectric Energy Conversion ◽  
Thermoelectric Energy

Solid-state thermoelectric devices are currently used in applications ranging from thermocouple sensors to power generators in space missions, to portable air-conditioners and refrigerators. With the ever-rising demand throughout the world for energy consumption and CO2 reduction, thermoelectric energy conversion has been receiving intensified attention as a potential candidate for waste-heat harvesting as well as for power generation from renewable sources. Efficient thermoelectric energy conversion critically depends on the performance of thermoelectric materials and devices. In this review, we discuss heat transfer in thermoelectric materials and devices, especially phonon engineering to reduce the lattice thermal conductivity of thermoelectric materials, which requires a fundamental understanding of nanoscale heat conduction physics.

Gas transport properties of polyimide membranes bearing phenyl pendant group

2017 ◽  
Vol 30 (2) ◽  
pp. 161-171 ◽  
Author(s):  
Guangliang Song ◽  
Lina Wang ◽  
Dandan Liu ◽  
Jianan Yao ◽  
Yiming Cao
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Gas Permeability ◽  
Pendant Group ◽  
Structure Property ◽  
Fractional Free Volume ◽  
Ether Linkage ◽  
Gas Transport Properties ◽  
Structure Property Relationship ◽  
Biphenyltetracarboxylic Dianhydride

Polyimides (PIs) with single phenyl pendant substitution were prepared based on three diamines containing phenyl pendant group, namely, 2,5-bis(4-aminophenoxy) biphenyl, 2-phenyl-4,4′-diaminodiphenyl ether, and 2,5-diaminobiphenyl (p-PDA), with the dianhydride component of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride, respectively. The physical properties of the membranes were examined, including thermal properties, fractional free volume ( FFV), solubility, and morphological structures, and were compared with the analogues without phenyl pendant. Gas transport properties of the membranes were investigated and discussed from the viewpoint of structure–property relationship. For 6FDA-derived PI membranes, gas permeability increased as the degree of PI backbone rigidity leveled up. Gas transport properties were not improved by the incorporation of phenyl pendant group for 6FDA type containing ether linkage and marginally improved as compared between PI (6FDA/p-PDA) and PI (6FDA/p-phenylenediamine (PDA)). To increase the phenyl substitution density of 6FDA/PDA-type backbone, a novel diamine bearing two phenyl pendant groups, that is, 2,6-diphenyl-1,4-diaminobenzene (p, p′-PDA) was synthesized, and PI derived from 6FDA and p, p′-PDA was prepared. The gas permeability coefficients of PI (6FDA/p, p′-PDA) were remarkably larger than those of PI (6FDA/p-PDA) and PI (6FDA/PDA).

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