Thermoelectric Performance of N-Type Polycrystalline SnSe With Surface Depletion by Pressureless Sintering
Document Type
Article
Publication Date
12-25-2020
Publication Title
Applied Surface Science
Volume
544
First page number:
1
Last page number:
5
Abstract
In this study, polycrystalline SnSe samples were prepared by a series of mechanical alloying (MA), uniaxial compaction, and subsequently pressureless sintering. It was found that the grains in the resultant SnSe samples grow along the (1 1 1) plane direction, resulting in forming a layered structure. Depending on the sintering time, the SnSe samples show the conversion of p-type conduction with the Seebeck coefficient value of +503 mu V/K to n-type conduction with the Seebeck coefficient value of -1500 mu V/K. The samples were characterized using X-ray diffraction and Raman spectroscopy to reveal that the transition of the Seebeck properties is due to the imbalanced composition of SnSe caused by impurities (SnSe2, SnSe1-x) formed during pressureless sintering. Also, the experiments and characterization results demonstrated a possibility to enhance thermoelectric properties if the pressureless sintering conditions would be well-controlled.
Keywords
Tin selenide; Mechanical alloying; Pressureless sintering; Thermoelectric property
Disciplines
Engineering | Materials Science and Engineering | Mechanical Engineering
Language
English
Repository Citation
Byun, J.,
An, H.,
Hong, J.,
Chun, D. W.,
Moon, J.
(2020).
Thermoelectric Performance of N-Type Polycrystalline SnSe With Surface Depletion by Pressureless Sintering.
Applied Surface Science, 544
1-5.
http://dx.doi.org/10.1016/j.apsusc.2020.148834