材料科学
塞贝克系数
有效质量(弹簧-质量系统)
热电效应
载流子散射
散射
电子迁移率
凝聚态物理
热电材料
功勋
兴奋剂
功率因数
电阻率和电导率
光电子学
光学
复合材料
热力学
功率(物理)
电气工程
热导率
物理
工程类
量子力学
作者
Lizhong Su,Haonan Shi,Sining Wang,Dongyang Wang,Bingchao Qin,Yuping Wang,Cheng Chang,Li‐Dong Zhao
标识
DOI:10.1002/aenm.202300312
摘要
Abstract Thermoelectric materials possess the potential for refrigeration and power generation due to their ability to directly convert heat and electricity. Carrier mobility and the Seebeck coefficient are key properties of thermoelectric materials. Improving the effective mass is the most effective and frequent way to optimize the Seebeck coefficient. However, carrier mobility deteriorates dramatically with increasing effective mass and thus limits further improvement of thermoelectric performance. Here, the focus is on the importance of modifying the scattering factor ( r ) to enhance the electrical properties, and it is found that the anisotropic scattering factor enhances the carrier mobility and Seebeck coefficient of anion‐doped n‐type tin selenide crystals along the out‐of‐plane direction, indicating the potential of modifying r to improve electrical properties. Following this strategy, the average dimensionless figure of merit ( ZT ave ) for iodine‐doped SnSe crystals is significantly improved from 0.84 to 1.57 in 300–773 K. The results emphasize the critical role of scattering factor and propose a new perspective for enhancing carrier mobility, providing a novel strategy to optimize thermoelectric performance.
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