Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Effect of Pb Doping on the Thermoelectric Properties of Bi0.48Sb1.52Te3

Bi0.48Sb1.52Te3의 열전특성에 대한 Pb 도핑 영향

  • Moon, Seung Pil (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Tae Wan (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Sung Wng (Department of Energy Science, Sungkyunkwan University) ;
  • Jeon, Woo Min (Department of Nano Applied Engineering, Kangwon National University) ;
  • Kim, Jin Heon (Department of Nano Applied Engineering, Kangwon National University) ;
  • Lee, Kyu Hyoung (Department of Nano Applied Engineering, Kangwon National University)
  • 문승필 (한국전력공사 전력연구원) ;
  • 김태완 (한국전력공사 전력연구원) ;
  • 김성웅 (성균관대학교 에너지과학과) ;
  • 전우민 (강원대학교 나노응용공학과) ;
  • 김진헌 (강원대학교 나노응용공학과) ;
  • 이규형 (강원대학교 나노응용공학과)
  • Received : 2017.04.04
  • Accepted : 2017.04.06
  • Published : 2017.07.01
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Abstract

$Bi_2Te_3$-based alloys have been intensively investigated as active materials for thermoelectric power generation devices from low-temperature (< $250^{\circ}C$) waste heat. In the present study, we fabricated Pb-doped, p-type $Bi_{0.48}Sb_{1.52}Te_3$ polycrystalline bulks by using meltsolidification and spark plasma sintering techniques, and evaluated their thermoelectric transport properties in an effort to develop optimized composition for low-temperature power generation applications. The electronic and thermal transport properties of $Bi_{0.48}Sb_{1.52}Te_3$ could be manipulated by Pb doping. As a result, the temperature for a peak thermoelectric performance (zT) gradually shifted toward higher temperatures with Pb content, suggesting that thermoelectric power generation efficiency can be enhanced by controlled Pb doping.

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