Electrodeposition of bismuth telluride thin films containing silica nanoparticles for thermoelectric applications

被引：8

作者：

Wu, Minxian ^{[1
,2
]}

Ramirez, Salvador Alvarado ^{[3
]}

Shafahian, Ehsan ^{[2
]}

Guo, Lingyi ^{[2
]}

Glorieux, Christ ^{[3
]}

Binnemans, Koen ^{[4
]}

Fransaer, Jan ^{[2
]}

机构：

[1] Changzhou Univ, Sch Petrochem Engn, Changzhou 213164, Peoples R China

[2] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44,POB 2450, B-3001 Heverlee, Belgium

[3] Katholieke Univ Leuven, Lab Soft Matter & Biophys, Dept Phys & Astron, Celestijnenlaan 200D,POB 2416, B-3001 Heverlee, Belgium

[4] Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200F,POB 2404, B-3001 Heverlee, Belgium

来源：

ELECTROCHIMICA ACTA | 2017年 / 253卷

关键词：

Bi2Te3; Nanoparticles; refractive index; thermoelectric material; ELECTROLYTIC CODEPOSITION; HETERODYNE-DETECTION; COMPOSITE COATINGS; HAMAKER CONSTANTS; PARTICLES; ALUMINUM; METAL; AFM;

D O I：

10.1016/j.electacta.2017.09.012

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrodeposition of bismuth telluride (Bi2Te3) with incorporated silica nanoparticles (diameter = 16 nm) was studied in ethylene glycol using a rotating disk electrode. "By matching the refractive index of the silica nanoparticles to the refractive index of the electrolyte i.e. "refractive index matching", the attractive van der Waals force between particles was minimized. Refractive index matching was used to avoid agglomeration of the silica particles in solution due to the attractive van der Waals forces and resulted in Bi2Te3 coatings that contain up to 8 vol% of individual silica particles as verified by TEM. The concentration of the incorporated silica nanoparticles was found to be influenced by several parameters: the applied current density, rotation speeds and silica concentration in the electrolyte. A model was developed to predict the amount of incorporated particles. The effect of each parameter was predicted by this model and verified experimentally. The Seebeck coefficient and thermal diffusivity of bismuth telluride films with and without silica nanoparticles were measured. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：554 / 562

页数：9

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