Enhanced Thermoelectric Characteristics of Ag2Se Nanoparticle Thin Films by Embedding Silicon Nanowires

Energies

Seunggen Yang¹  Sangsig Kim¹  Kyoungah Cho¹ 

[1] Department of Electrical Engineering, Korea University, Seoul 02841, Korea;

关键词: thermoelectric;    silver selenide nanoparticles;    silicon nanowires;    thin film;   

DOI  :  10.3390/en13123072

来源: DOAJ

【 摘 要 】

A solution-processable Ag₂Se nanoparticle thin film (NPTF) is a prospective thermoelectric material for plastic-based thermoelectric generators, but its low electrical conductivity hinders the fabrication of high performance plastic-based thermoelectric generators. In this study, we design Ag₂Se NPTFs embedded with silicon nanowires (SiNWs) to improve their thermoelectric characteristics. The Seebeck coefficients are −233 and −240 µV/K, respectively, for a Ag₂Se NPTF alone and a Ag₂Se NPTF embedded with SiNWs. For the Ag₂Se NPTF embedded with SiNWs, the electrical conductivity is improved from 0.15 to 18.5 S/m with the embedment of SiNWs. The thermal conductivities are determined by a lateral thermal conductivity measurement for nanomaterials and the thermal conductivities are 0.62 and 0.84 W/(m·K) for a Ag₂Se NPTF alone and a Ag₂Se NPTF embedded with SiNWs, respectively. Due to the significant increase in the electrical conductivity and the insignificant increase in its thermal conductivity, the output power of the Ag₂Se NPTF embedded with SiNWs is 120 times greater than that of the Ag₂Se NPTF alone. Our results demonstrate that the Ag₂Se NPTF embedded with SiNWs is a prospective thermoelectric material for high performance plastic-based thermoelectric generators.

【 授权许可】

Unknown