Chen Xin, Baumgart Helmut
Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, VA 23529, USA.
Applied Research Center at Thomas Jefferson National Accelerator Laboratories, 12050 Jefferson Avenue, Suite 721, Newport News, VA 23606, USA.
Materials (Basel). 2020 Mar 12;13(6):1283. doi: 10.3390/ma13061283.
Thermoelectrics is a green renewable energy technology which can significantly contribute to power generation due to its potential in generating electricity out of waste heat. The main challenge for the development of thermoelectrics is its low conversion efficiency. One key strategy to improve conversion efficiency is reducing the thermal conductivity of thermoelectric materials. In this paper, the state-of-the-art progresses made in improving thermoelectric materials are reviewed and discussed, focusing on phononic engineering via applying porous templates and ALD deposited nanolaminates structure. The effect of nanolaminates structure and porous templates on Seebeck coefficient, electrical conductivity and thermal conductivity, and hence in figure of merit zT of different types of materials system, including PnCs, lead chalcogenide-based nanostructured films on planar and porous templates, ZnO-based superlattice, and hybrid organic-inorganic superlattices, will be reviewed and discussed.
热电子学是一种绿色可再生能源技术,因其具有从废热中发电的潜力,可为发电做出重大贡献。热电子学发展的主要挑战在于其转换效率较低。提高转换效率的一个关键策略是降低热电材料的热导率。本文回顾并讨论了在改进热电材料方面取得的最新进展,重点是通过应用多孔模板和原子层沉积纳米层状结构进行声子工程。将回顾并讨论纳米层状结构和多孔模板对塞贝克系数、电导率和热导率的影响,进而对不同类型材料体系的品质因数zT的影响,这些材料体系包括声子晶体、平面和多孔模板上的基于硫属铅化物的纳米结构薄膜、基于氧化锌的超晶格以及有机-无机混合超晶格。