Open AccessInvestigating the existence of oxygen interstitial in CuCr1xMgxO2 [0.00 X 0.30] thermoelectric materials by X-Ray photoelectron spectroscopy [XPS]
Author(s) -
Dũng Hoàng Văn,
Anh Tuấn Thanh Phạm,
Thư Nguyễn Bảo Lê,
Thu Hien Nguyen,
Thắng Bách Phan,
Vinh Cao Trần
Publication year - 2021
Publication title -
khoa học và công nghệ: tự nhiên
Language(s) - English
Resource type - Journals
ISSN - 2588-106X
DOI - 10.32508/stdjns.v5i2.973
Subject(s) - x ray photoelectron spectroscopy , thermoelectric effect , materials science , impurity , oxygen , doping , fossil fuel , electricity , thermoelectric materials , analytical chemistry (journal) , chemical engineering , chemistry , thermal conductivity , optoelectronics , composite material , thermodynamics , environmental chemistry , electrical engineering , physics , organic chemistry , engineering
Climate change is promoting researches on materials which is capable of converting environmentally friendly energy, in which materials that convert heat into electricity are receiving significant attention, because their ability of converting heat to electricity not only generates the electricity but also contributes to slow down the consumption of fossil fuel. The existence of point defects in the semiconductors greatly effected properties of materials, especially thermoelectric properties. Therefore, the study of defects in materials is a popular research trend today. In this study, we focus on evaluating the existence of oxygen interstitial in CuCr1xMgxO2 [0.00 x 0.30] compounds, because oxygen interstitial greatly affected the thermoelectric properties of this material. Based on X-ray photoelectron spectroscopy (XPS) analysis, at the large ratio of Mg impurity x = 0.15, the compound had the highest percentage of oxygen interstitial and was also a good thermoelectric material. In addition, it could be also seen that CuCrO2 material being doped a large Mg doping ratio (x = 0.15) was suitable for thermal-to-electrical applications rather than the ones with a small ratio (x 0.05).