scholarly journals Ordered sphalerite derivative Cu5Sn2S7: a degenerate semiconductor with high carrier mobility in the Cu-Sn-S diagram

2021 ◽  
Author(s):  
Ventrapati Pavan Kumar ◽  
Pierric Lemoine ◽  
Virginia Carnevali ◽  
Gabin Guélou ◽  
Oleg I. Lebedev ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Thermoelectric Materials ◽  
Carrier Mobility ◽  
Degenerate Semiconductor ◽  
Earth Abundant ◽  
High Carrier Mobility ◽  
High Carrier ◽  
Cost Efficient

Regardless the complexity of the phase diagram of the Cu-Sn-S system, several compositions near the prototypical mohite Cu2SnS3 have arisen as potential non-toxic, earth-abundant and cost-efficient photovoltaic and thermoelectric materials....

scholarly journals Achieving High Thermoelectric Performance in Rare-Earth Element-Free CaMg2Bi2 with High Carrier Mobility and Ultralow Lattice Thermal Conductivity

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Muchun Guo ◽  
Fengkai Guo ◽  
Jianbo Zhu ◽  
Li Yin ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
Carrier Mobility ◽  
Lattice Thermal Conductivity ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Widespread Application ◽  
Compatibility Factor ◽  
High Carrier Mobility ◽  
High Carrier

CaMg2Bi2-based compounds, a kind of the representative compounds of Zintl phases, have uniquely inherent layered structure and hence are considered to be potential thermoelectric materials. Generally, alloying is a traditional and effective way to reduce the lattice thermal conductivity through the mass and strain field fluctuation between host and guest atoms. The cation sites have very few contributions to the band structure around the fermi level; thus, cation substitution may have negligible influence on the electric transport properties. What is more, widespread application of thermoelectric materials not only desires high ZT value but also calls for low-cost and environmentally benign constituent elements. Here, Ba substitution on cation site achieves a sharp reduction in lattice thermal conductivity through enhanced point defects scattering without the obvious sacrifice of high carrier mobility, and thus improves thermoelectric properties. Then, by combining further enhanced phonon scattering caused by isoelectronic substitution of Zn on the Mg site, an extraordinarily low lattice thermal conductivity of 0.51 W m-1 K-1 at 873 K is achieved in (Ca0.75Ba0.25)0.995Na0.005Mg1.95Zn0.05Bi1.98 alloy, approaching the amorphous limit. Such maintenance of high mobility and realization of ultralow lattice thermal conductivity synergistically result in broadly improvement of the quality factor β. Finally, a maximum ZT of 1.25 at 873 K and the corresponding ZTave up to 0.85 from 300 K to 873 K have been obtained for the same composition, meanwhile possessing temperature independent compatibility factor. To our knowledge, the current ZTave exceeds all the reported values in AMg2Bi2-based compounds so far. Furthermore, the low-cost and environment-friendly characteristic plus excellent thermoelectric performance also make the present Zintl phase CaMg2Bi2 more competitive in practical application.

scholarly journals Hybrid-structured ZnO thermoelectric materials with high carrier mobility and reduced thermal conductivity

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 10855-10864 ◽  
Author(s):  
Dai-Bing Zhang ◽  
He-Zhang Li ◽  
Bo-Ping Zhang ◽  
Dou-dou Liang ◽  
Min Xia
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
Carrier Mobility ◽  
Figure Of Merit ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
High Carrier Mobility ◽  
High Carrier

We obtained a high thermoelectric figure of merit (ZT) in this simple ZnO by adopting a hybrid micro/nano structuring approach.

Efficient lanthanide Gd Doping Promoting Thermoelectric Performance of Mg3Sb2-based Materials

2021 ◽  
Author(s):  
Jingdan Lei ◽  
Hexige Wuliji ◽  
Kunpeng Zhao ◽  
Tian-Ran Wei ◽  
Qing Xu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
Carrier Mobility ◽  
Lattice Thermal Conductivity ◽  
Thermoelectric Performance ◽  
High Carrier Mobility ◽  
High Carrier ◽  
High Band

Mg3Sb2-based thermoelectric materials have recently received heightened attentions due to its diverse merits of high band degeneracy, ultralow lattice thermal conductivity and high carrier mobility. However, the inherently low carrier...

scholarly journals Conductive Metallophthalocyanine Framework Films with High Carrier Mobility as Efficient Chemiresistors

2021 ◽  
Author(s):  
Hong-Cai Zhou ◽  
Yan Yue ◽  
Peiyu Cai ◽  
Xiaoyi Xu ◽  
Hanying Li ◽  
...  
Keyword(s):  
Carrier Mobility ◽  
High Carrier Mobility ◽  
High Carrier

scholarly journals Conductive Metallophthalocyanine Framework Films with High Carrier Mobility as Efficient Chemiresistors

2021 ◽  
Vol 60 (19) ◽  
pp. 10806-10813
Author(s):  
Yan Yue ◽  
Peiyu Cai ◽  
Xiaoyi Xu ◽  
Hanying Li ◽  
Hongzheng Chen ◽  
...  
Keyword(s):  
Carrier Mobility ◽  
High Carrier Mobility ◽  
High Carrier

Auxetic, flexible, and strain-tunable two-dimensional th-AlN for photocatalytic visible light water splitting with anisotropic high carrier mobility

2021 ◽  
Vol 9 (14) ◽  
pp. 4971-4977
Author(s):  
Mehmet Emin Kilic ◽  
Kwang-Ryeol Lee
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Water Splitting ◽  
Carrier Mobility ◽  
Two Dimensional ◽  
Light Water ◽  
Photocatalytic Water Splitting ◽  
Electronic And Optical Properties ◽  
High Carrier Mobility ◽  
High Carrier

Tetrahexagonal AlN: a novel two-dimensional family for photocatalytic water splitting with exceptional mechanical, electronic, and optical properties.

scholarly journals High carrier mobility and ultralow thermal conductivity in the synthetic layered superlattice Sn4Bi10Se19

2021 ◽  
Author(s):  
Ruiming Lu ◽  
Alan Olvera ◽  
Trevor Bailey ◽  
Jiefei Fu ◽  
Xianli Su ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Crystal Lattice ◽  
Carrier Mobility ◽  
Complex Materials ◽  
High Carrier Mobility ◽  
High Carrier

The integration within the same crystal lattice of two or more structurally and chemically distinct building units enables the design of complex materials featuring the coexistence of dissimilar functionalities. Here...

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