2024

Vol.31 No.2

Editorial Office

Review

  • Journal of the Microelectronics and Packaging Society
  • Volume 28(4); 2021
  • Article

Review

Journal of the Microelectronics and Packaging Society 2021;28(4):103-107. Published online: Mar, 18, 2022

Control of Weighted Mobility Ratio to Enhance the Performance of Bi-Te-based Thermoelectric Materials

  • Min Young Kim1, Hyun-Sik Kim2,†, Kyu Hyoung Lee1,†
    1Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea 2Department of Materials Science and Engineering, Hongik University, 94 Wausan-ro, Seoul 04066, Korea
Corresponding author E-mail: hyunsik.kim@hongik.ac.kr, khlee2018@yonsei.ac.kr
Abstract

좁은 밴드갭 반도체 특성을 나타내는 열전소재의 온도에 따른 전자전도 및 열전도 특성은 다수 캐리어 뿐 아 니라 소수 캐리어의 전도 거동에 의해 결정된다. 따라서 소수 캐리어의 weighted mobility에 대한 다수 캐리어의 weighted mobility의 비율로 정의되는 weighted mobility ratio는 열전소재의 성능 증대에 매우 중요한 인자이다. 본 논문에서는 열 전소재의 전자전도 현상에 대한 이론적인 고찰을 바탕으로 weighted mobility ratio 제어가 열전소재의 성능에 미치는 영 향을 규명하여 고성능 Bi-Te계 열전소재 개발에 효과적으로 활용할 수 있는 소재 설계 지침을 제공하고자 한다.
Temperature dependences of electronic and thermal transport properties of narrow band gap thermoelectric materials are dependent on the transport behavior of minority carriers as well as majority carriers. Thus, weighted mobility ratio, which is defined the ratio of weighted mobility for majority carriers to that for minority carriers, must be one of the important parameters to enhance the performance of thermoelectric materials. Herein, we provided a practical guide for the development of high-performance Bi-Te-based thermoelectric materials based on the weighted mobility ratio control by considering theoretical backgrounds related to the electronic transport phenomena in semiconductors.

Keywords Thermoelectric, Bi-Te, Weighted mobility ratio, bipolar