Thermoelectric properties of silver-doped n-type Bi2Te3-based material prepared by mechanical alloying and subsequent hot pressing

A High Performance Ag Alloyed Nano-scale n-type Bi2Te3 Based Thermoelectric Material

“…Considering the density measurement results in this study, the decrease of the electrical conductivity could be caused by the increased micro-voids in the structure. In addition to the micro-voids, some researchers claimed that surplus Ag atoms will take the place of Bi sites in the Bi 2 Te 3 lattice and then act as acceptors instead of donors, which therefore leads to the decrease of electrical conductivity [14].…”

Thermoelectric Properties of Ag-Doped Bi2(Se,Te)3Compounds: Dual Electronic Nature of Ag-Related Lattice Defects

“…17 However, the available interstitial sites at the van der Waals gap are limited, and excess Ag and Cu dopants may take Bi substitutional sites by forming Ag Bi and Cu Bi substitutional defects. 26,27 In summary, the combination of all vacancies and substitutional and interstitial defects have, without question, a rather complicated influence on thermoelectric properties of Ag-doped Bi 2 (Se,Te) 3 . However, we still lack a systematic study on the roles of various Ag-related lattice defects in Bi 2 (Se,Te) 3 .…”

Microstructure control and thermoelectric properties improvement to n-type bismuth telluride based materials by hot extrusion

“…Many researchers utilized the more costeffective mechanical alloying (MA) method to prepare the alloy powder. Some of the typical work includes, PIES by Tokiai and Koumoto [2], BMA by Yang et al [3,4], MA by Hyun et al [5], Martin-Lopez et al [6] and Yang et al [7], etc. Yet thermoelectric properties of materials obtained by PM are not so satisfying due to the loss of anisotropy characteristic, especially for n-type materials.…”