Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (~ 4.4 mW m− 1 K− 2) at 300 K was obtained using 0.31 at.% Pb-doped Bi0.52Sb1.48Te3 and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (ηmax) could be enhanced by 150% at ΔT = 220 K when the Pb concentration was optimized.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) ( 2014R1A2A1A10053869 ) and the Priority Research Centers Program ( 2009-0093823 ).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys