Energy-filtering-induced high power factor in PbS-nanoparticles-embedded TiS2
Year: 2015
Type: article
Abstract: We report on a greatly enhanced power factor for 1%PbS-nanoparticle-embedded TiS2 bulk ceramic, about 1 mW/(mK2) at 300 K and 1.23 mW/(mK2) in a wide temperature range of 573 ∼ 673 K, of which the latter is among the highest so far for TiS2-based thermoelectric materials. Compared to TiS2, the power factor is increased by ∼110% at 300 K and (50 ∼ 35)% at 573 ∼ 673 K. This enhancement is derived from a large increase in Seebeck coefficient which overwhelmed the modest degradation of electrical conductivity, which should be attributed to energy filtering induced by the band gap offset between TiS2 and PbS.
Source: AIP Advances
DOI: 10.1063/1.4918687
Authors: Yulong Wang, Junfu Wen, Zhenghua Fan, Ningzhong Bao, Rong Huang, Rong Tu, Yifeng Wang
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,350
OpenAlex ID: W2067864206