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Investigation of thermoelectric properties of Cu2SnSe3 composites incorporated with SnSe
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-07-29 , DOI: 10.1016/j.physb.2020.412411
Riya Thomas , Ashok Rao , Chun Yin Chung , Yung-Kang Kuo , B. Shivamurthy

Cu2SnSe3 has been considered as a potential thermoelectric material owing to its cost-effective and nontoxic constituent elements along with its high electrical conductivity. However, its low Seebeck coefficient has been a concern towards realizing a high figure-of-merit. In the present study, Cu2SnSe3/xSnSe (x = 0, 5, 10, and 20 wt %) composite samples whose thermoelectric performance has been studied in the temperature range 10–375 K, shows that the Seebeck coefficient of sample containing 10% SnSe is ~3.6 times that of the pure. The incorporation of SnSe has resulted in a significant increase in electrical resistivity and Seebeck coefficient which is attributable to the decrease in carrier concentration with increase in SnSe content. Concurrently, a power factor (PF) of 35.60 μW/mK2 has been attained for x = 10% sample at 375 K. However, due to the increase in thermal conductivity with the addition of SnSe, the composites have lower ZT values than that of the pristine Cu2SnSe3 sample. Furthermore, the Vicker's microhardness, which is a key measure for the mechanical strength of a material, has distinctly improved by the addition of SnSe.



中文翻译:

SnSe与Cu 2 SnSe 3复合材料的热电性能研究

由于Cu 2 SnSe 3具有成本效益,无毒的构成元素以及高电导率,因此被认为是一种潜在的热电材料。然而,其低塞贝克系数一直是实现高品质因数的关注点。在本研究中,Cu 2 SnSe 3 / x SnSe(x = 0、5、10和20 wt%的复合样品的热电性能已在10–375 K的温度范围内进行了研究,结果表明,含10%SnSe的样品的塞贝克系数约为纯样品的3.6倍。SnSe的掺入导致电阻率和塞贝克系数的显着增加,这归因于载流子浓度随SnSe含量的增加而降低。同时,功率因数(PF)的35.60μW/ mK的2已经达到了X 在375 K. = 10%样品然而,由于在通过添加位SnSe的热传导率的增加,复合材料具有较低的ZT值比Cu 2 SnSe 3的含量样品。此外,通过添加SnSe可以显着改善维氏显微硬度,这是衡量材料机械强度的关键指标。

更新日期:2020-08-03
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