Facile synthesis of copper selenides with different stoichiometric compositions and their thermoelectric performance at a low temperature range.

ABSTRACT: Copper selenide is widely considered to be a promising candidate for high-performance flexible thermoelectrics; however, most of the reported ZT values of copper selenides are unsatisfactory at a relatively low temperature range. Herein, we utilized some wet chemical methods to synthesize a series of copper selenides. XRD, SEM and TEM characterizations revealed that CuSe, Cu₃Se₂ and Cu_2-x Se were prepared successfully and possessed different morphologies and sizes. Based on the analysis of their thermoelectric properties, Cu_2-x Se exhibited the highest Seebeck coefficient and lowest thermal conductivity among the three samples owing to its unique crystal structure. After being sintered at 400 °C under N₂ atmosphere

SUBMITTER: Li L 

PROVIDER: S-EPMC9037115 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature