Year: 2015
Type: article
Abstract: We suggest a simple and scalable synthesis to prepare Cu‐Bi2Te2.7Se0.3 (Cu‐BTS) nanocomposites. By precipitating Cu nanoparticle (NP) in colloidal suspension of as‐exfoliated BTS, homogeneous mixtures of Cu NP and BTS nanosheet were readily achieved, and then the sintered nanocomposites were fabricated by spark plasma sintering technique using the mixed powder as a raw material. The precipitated Cu NPs in the BTS matrix effectively generated nanograin (BTS) and heterointerface (Cu/BTS) structures. The maximum ZT of 0.90 at 400 K, which is 15% higher compared to that of pristine BTS, was obtained in 3 vol% Cu‐BTS nanocomposite. The enhancement of ZT resulted from improved power factor by carrier filtering effect due to the Cu nanoprecipitates in the BTS matrix.
Source: Journal of Nanomaterials
DOI: 10.1155/2015/820893
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,375
OpenAlex ID: W1484235943