首页    期刊浏览 2024年11月27日 星期三
登录注册

文章基本信息

  • 标题:Oxidation-induced thermopower inversion in nanocrystalline SnSe thin film
  • 本地全文:下载
  • 作者:Sunao Shimizu ; Kazumoto Miwa ; Takeshi Kobayashi
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2021
  • 卷号:11
  • 期号:1
  • 页码:1637
  • DOI:10.1038/s41598-021-81195-7
  • 出版社:Springer Nature
  • 摘要:Abstract Given the growing demand for environmentally friendly energy sources, thermoelectric energy conversion has attracted increased interest as a promising CO 2 -free technology. SnSe single crystals have attracted attention as a next generation thermoelectric material due to outstanding thermoelectric properties arising from ultralow thermal conductivity. For practical applications, on the other hand, polycrystalline SnSe should be also focused because the production cost and the flexibility for applications are important factors, which requires the systematic investigation of the stability of thermoelectric performance under a pseudo operating environment. Here, we report that the physical properties of SnSe crystals with nano to submicron scale are drastically modified by atmospheric annealing. We measured the Seebeck effect while changing the annealing time and found that the large positive thermopower,   757 μV K −1 , was completely suppressed by annealing for only a few minutes and was eventually inverted to be the large negative value, − 427 μV K −1 . This result would further accelerate intensive studies on SnSe nanostructures, especially focusing on the realistic device structures and sealing technologies for energy harvesting applications.
国家哲学社会科学文献中心版权所有