Thermoelectric materials can reversely convert heat and electricity into each other; therefore, they can be very useful for energy harvesting from heat waste. Among many thermoelectrical materials, SnSe exhibits outstanding thermoelectric performance along the particular direction of a single crystal. However, single-crystal SnSe has poor mechanical properties and thus it is difficult to apply for mass production. Therefore, polycrystalline SnSe materials may be used to replace single-crystal SnSe by overcoming its inferior thermoelectric performance owing to surface oxidation. Considerable efforts are currently focused on enhancing the thermoelectric performance of polycrystalline SnSe. In this study, we briefly review various enhancement methods for SnSe thermoelectric materials, including doping, texturing, and nano-structuring. Finally, we discuss the future prospects of SnSe thermoelectric powder materials.

Abstract
1. 서 론
2. 열전 재료 연구 동향
3. SnSe의 열전 특성 및 개선
    3.1. 원소 도핑
    3.2. 텍스쳐링(texturing)
    3.3. 나노 구조화(nano-structuring)
    3.4. 그 외 향상법
4. 결론 및 전망
References

• 정명준(서울과학기술대학교 신소재공학과, 서울과학기술대학교 분말기술연구소) | Myeong Jun Jung (Department of Materials Science and Engineering, Seoul National University of Science and Technology,The Institute of Powder Technology, Seoul National University of Science and Technology,)
• 최병준(서울과학기술대학교 신소재공학과, 서울과학기술대학교 분말기술연구소) | Byung Joon Choi (Department of Materials Science and Engineering, Seoul National University of Science and Technology,The Institute of Powder Technology, Seoul National University of Science and Technology,) Corresponding author