A novel chemical process of Bi2Te2.7Se0.3 nanocompound for effective adjustment in transport properties resulting in remarkable n-type thermoelectric performance

作者：Kim Cham; Kim Chang Eun; Baek Ju Young; Kim Dong Hwan; Kim Jong Tae; Ahn Ji Hyeon; Lopez David Humberto; Kim Hoyoung

来源：Scripta Materialia, 2016, 119: 13-16.

DOI：10.1016/j.scriptamat.2016.03.010

• Thermoelectric materials
• Nanostructure
• Bismuth telluride
• Thermal conductivity
• Electrical conductivity

Chemical reaction processes for thermoelectric nanomaterials have received a lot of attention because of subsequent small and uniform nanostructures, causing a remarkable reduction in thermal conductivity; however, they typically showed low electrical properties possibly due to contaminations by chemicals resulting in low ZT. We devised a new chemical process for synthesizing an n-type Bi2Te2.7Se0.3 nanocompound without the chemicals causing potential contaminations. The product exhibited a predominant electrical conductivity while retaining the advantage of chemical reaction routes; thus, synergistic effect of the thermoelectric transport properties was greatly induced, resulting in the highest ZT among n-type Bi2Te3 materials in bulk phase.

• 出版日期2016-7-1