Citation: Kai GUO, Hao-Jie HUO, Jun LUO. Point Defect Engineering Boosting the Thermoelectric Properties of Layered 122 Zintl Compounds[J]. Chinese Journal of Structural Chemistry, ;2020, 39(5): 815-820. doi: 10.14102/j.cnki.0254–5861.2011–2830 shu

Point Defect Engineering Boosting the Thermoelectric Properties of Layered 122 Zintl Compounds

Kai GUO ^a ,
Hao-Jie HUO ^a ,
Jun LUO ^{a, b,,}

a.
School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
b.
Materials Genome Institute, Shanghai University, Shanghai 200444, China

Corresponding author: Jun LUO, junluo@shu.edu.cn
Received Date: 30 March 2020
Accepted Date: 5 May 2020

Fund Project: the National Key Research and Development Program of China 2018YFA0702100the National Natural Science Foundation of China 21771123the National Natural Science Foundation of China 51772186the National Natural Science Foundation of China 51632005the Program of Introducing Talents of Discipline to Universities D16002

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The layered 122 Zintl compounds have become an intriguing class of thermoelectric materials due to the promising electronic transport properties and inherently low thermal conductivity, showing the typical characteristics of "phonon-glass electron-crystal". Owing to the unprecedented performance tunability, the thermoelectric properties of the layered-structure compounds are completive with some traditional thermoelectric materials. Point defects involving vacancy, aliovalent doping and equivalent alloying atoms have been introduced to further enhance the thermoelectric properties. This review emphasizes the effects of various point defects on the thermoelectric parameters, and provides perspective on the strategies for increasing the thermoelectric figure of merit zT, which are believed to be applicable for improving the thermoelectric properties of many other compounds.
- layered structure,
- 122 Zintl phase,
- point defect,
- orbital alignment,
- phonon scattering,
- thermoelectric properties
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