材料科学
热电效应
热电材料
兴奋剂
功勋
掺杂剂
微晶
热导率
凝聚态物理
功率因数
塞贝克系数
电阻率和电导率
堆积
光电子学
工程物理
复合材料
电气工程
冶金
核磁共振
功率(物理)
热力学
工程类
物理
作者
Bogong Su,Zhanran Han,Yilin Jiang,Hua‐Lu Zhuang,Jincheng Yu,Jun Pei,Haihua Hu,Jing‐Wei Li,Ye He,Bo‐Ping Zhang,Jing‐Feng Li
标识
DOI:10.1002/adfm.202301971
摘要
Abstract Thermoelectric technology enables the direct interconversion between heat and electricity. SnSe has received increasing interest as a new promising thermoelectric compound due to its exceptionally high performance reported in crystals. SnSe possesses intrinsic low thermal conductivity as a congenital advantage for thermoelectric, but high thermoelectric performance can be hardly achieved due to the difficulty to realize efficient doping to raise its low carrier concentration to an optimal level. In this work, it is found that a series of rare earth elements are effective dopants for SnSe, which can greatly improve the electrical transport properties of p ‐type polycrystalline SnSe. In particular, the remarkable enhancement in electrical conductivity and power factor is achieved by Na/Er co‐doping at 873 K. The lattice thermal conductivity is reduced due to the presence of abundant defects (dislocations, stacking faults, and twin boundaries). Consequently, a peak thermoelectric figure of merit ZT (2.1) as well as a high average ZT (0.77) are achieved in polycrystalline SnSe.
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