Influence of GeP precipitates on the thermoelectric properties of P-type GeTe and Ge0.9−xPxSb0.1Te compounds

CrystEngComm ◽  
2018 ◽  
Vol 20 (41) ◽  
pp. 6449-6457 ◽  
Author(s):  
J. Rajeev Gandhi ◽  
Raja Nehru ◽  
Sheng-Ming Chen ◽  
Raman Sankar ◽  
Khasim Saheb Bayikadi ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Point Defects ◽  
Secondary Phase ◽  
Rich Phase ◽  
System P ◽  
Scattering Effects ◽  
P Type

The incorporation of P in GST forms the secondary GeP rich phase. The presence of secondary phase and point defects (Sb and P) enhanced the additional scattering effects in the system.

Enhancement of thermoelectric properties by Na doping in Te-free p-type AgSbSe2

2015 ◽  
Vol 44 (3) ◽  
pp. 1046-1051 ◽  
Author(s):  
Songting Cai ◽  
Zihang Liu ◽  
Jianyong Sun ◽  
Rui Li ◽  
Weidong Fei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Point Defects ◽  
Power Factor ◽  
Stacking Faults ◽  
Na Doping ◽  
P Type

Na substituting Sb in the AgSbSe2 not only improves the power factor caused by the enhanced carrier concentration, but also decreases the thermal conductivity due to point defects, nanoscale stacking faults and Na-rich precipitate. Consequently, a high ZT value of 0.92 is achieved in the AgSb0.99Na0.01Se2 sample.

Investigation of the thermoelectric properties of the PbTe-SrTe system

2010 ◽  
Vol 1267 ◽  
Author(s):  
Kanishka Biswas ◽  
Jiaqing He ◽  
Qichun Zhang ◽  
Guoyu Wang ◽  
Ctirad Uher ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Secondary Phase ◽  
Positive Sign ◽  
X Ray Diffraction ◽  
Rock Salt Structure ◽  
High Power Factor ◽  
Salt Structure ◽  
Diffraction Patterns ◽  
P Type ◽  
Type Conduction

AbstractPbTe-based materials are promising for efficient heat energy to electricity conversion. We present studies of the thermoelectric properties of the PbTe-SrTe system. X-ray diffraction patterns reveal that all the samples crystallize in the rock salt structure without noticeable secondary phase. Na2Te doping of the PbTe-SrTe materials resulting in a positive sign Hall coefficient indicating p-type conduction. Lattice thermal conductivity is significantly decreased with the insertion of SrTe in PbTe lattice. The ZT ∼ 1.3 of these materials is derived from their very low thermal conductivities and reasonably high power factor at 800 K.

Enhancing thermoelectric properties of p-type CoSb3 skutterudite by Fe doping

2021 ◽  
Vol 127 ◽  
pp. 105721
Author(s):  
Suchitra Yadav ◽  
Sujeet Chaudhary ◽  
Dinesh K. Pandya
Keyword(s):  
Thermoelectric Properties ◽  
Fe Doping ◽  
P Type

scholarly journals Giant Tuning of Electronic and Thermoelectric Properties by Epitaxial Strain in p-Type Sr-Doped LaCrO3 Transparent Thin Films

2021 ◽  
Author(s):  
Dong Han ◽  
Rahma Moalla ◽  
Ignasi Fina ◽  
Valentina M. Giordano ◽  
Marc d’Esperonnat ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermoelectric Properties ◽  
Epitaxial Strain ◽  
P Type

Optimization of the Thermoelectric Properties of p-Type Mg2–yLiyGe1–xSnx and Mg2–yLiyGe1–zSiz with x, z = 0.1 and 0.2

2021 ◽  
Author(s):  
Vidushi Galwadu Arachchige ◽  
Hasbuna Kamila ◽  
Aryan Sankhla ◽  
Léo Millerand ◽  
Silvana Tumminello ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
P Type

scholarly journals Mechanosynthesis and Thermoelectric Properties of Fe, Zn, and Cd-Doped P-Type Tetrahedrite: Cu12-xMxSb4S13

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3448
Author(s):  
Francisco Arturo López Cota ◽  
José Alonso Díaz-Guillén ◽  
Oscar Juan Dura ◽  
Marco Antonio López de la Torre ◽  
Joelis Rodríguez-Hernández ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Powder Processing ◽  
High Energy ◽  
Secondary Phases ◽  
Ambient Conditions ◽  
Cadmium Sulfate ◽  
Electrical Conductivities ◽  
Compositional Changes ◽  
P Type

This contribution deals with the mechanochemical synthesis, characterization, and thermoelectric properties of tetrahedrite-based materials, Cu12-xMxSb4S13 (M = Fe2+, Zn2+, Cd2+; x = 0, 1.5, 2). High-energy mechanical milling allows obtaining pristine and substituted tetrahedrites, after short milling under ambient conditions, of stoichiometric mixtures of the corresponding commercially available binary sulfides, i.e., Cu2S, CuS, Sb2S3, and MS (M = Fe2+, Zn2+, Cd2+). All the target materials but those containing Cd were obtained as single-phase products; some admixture of a hydrated cadmium sulfate was also identified by XRD as a by-product when synthesizing Cu10Cd2Sb4S13. The as-obtained products were thermally stable when firing in argon up to a temperature of 350–400 °C. Overall, the substitution of Cu(II) by Fe(II), Zn(II), or Cd(II) reduces tetrahedrites’ thermal and electrical conductivities but increases the Seebeck coefficient. Unfortunately, the values of the thermoelectric figure of merit obtained in this study are in general lower than those found in the literature for similar samples obtained by other powder processing methods; slight compositional changes, undetected secondary phases, and/or deficient sintering might account for some of these discrepancies.

Thermoelectric properties of p-type polycrystalline Bi0.8Sb0.8In0.4Se3

2021 ◽  
Vol 118 (19) ◽  
pp. 193903
Author(s):  
Feng Jiang ◽  
Chengliang Xia ◽  
Yongbin Zhu ◽  
Zhijia Han ◽  
Chengyan Liu ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
P Type
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