Zheng Yun, Slade Tyler J, Hu Lei, Tan Xian Yi, Luo Yubo, Luo Zhong-Zhen, Xu Jianwei, Yan Qingyu, Kanatzidis Mercouri G
Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University, Wuhan 430056, China.
Chem Soc Rev. 2021 Aug 21;50(16):9022-9054. doi: 10.1039/d1cs00347j. Epub 2021 Jun 17.
Thermoelectric energy conversion is an all solid-state technology that relies on exceptional semiconductor materials that are generally optimized through sophisticated strategies involving the engineering of defects in their structure. In this review, we summarize the recent advances of defect engineering to improve the thermoelectric (TE) performance and mechanical properties of inorganic materials. First, we introduce the various types of defects categorized by dimensionality, i.e. point defects (vacancies, interstitials, and antisites), dislocations, planar defects (twin boundaries, stacking faults and grain boundaries), and volume defects (precipitation and voids). Next, we discuss the advanced methods for characterizing defects in TE materials. Subsequently, we elaborate on the influences of defect engineering on the electrical and thermal transport properties as well as mechanical performance of TE materials. In the end, we discuss the outlook for the future development of defect engineering to further advance the TE field.
热电能量转换是一种全固态技术，它依赖于特殊的半导体材料，这些材料通常通过涉及结构缺陷工程的复杂策略进行优化。在本综述中，我们总结了缺陷工程在改善无机材料热电（TE）性能和机械性能方面的最新进展。首先，我们介绍按维度分类的各种缺陷类型，即点缺陷（空位、间隙原子和反位原子）、位错、平面缺陷（孪晶界、堆垛层错和晶界）和体积缺陷（析出物和空洞）。接下来，我们讨论表征TE材料中缺陷的先进方法。随后，我们详细阐述缺陷工程对TE材料的电输运和热输运性质以及机械性能的影响。最后，我们讨论缺陷工程未来发展的前景，以进一步推动TE领域的发展。
