Remarkable enhancement in thermoelectric performance of BiCuSeO by Cu deficiencies

Yong Liu, Li Dong Zhao, Yaochun Liu, Jinle Lan, Wei Xu, Fu Li, Bo Ping Zhang, David Berardan, Nita Dragoe, Yuan Hua Lin, Ce Wen Nan, Jing Feng Li, Hongmin Zhu

研究成果: Article査読

254 被引用数 (Scopus)

抄録

A significant enhancement of thermoelectric performance in layered oxyselenides BiCuSeO was achieved. The electrical conductivity and Seebeck coefficient of BiCu1-xSeO (x = 0-0.1) indicate that the carriers were introduced in the (Cu2Se2)2- layer by Cu deficiencies. The maximum of electrical conductivity is 3 × 103 S m-1 for Bicu0.975Seo at 650 °C, much larger than 470 S m-1 for pristine BiCuSeO. Featured with very low thermal conductivity (∼0.5 W m-1 K-1) and a large Seebeck coefficient (+273 μV K-1), ZT at 650 °C is significantly increased from 0.50 for pristine BiCuSeO to 0.81 for BiCu0.975SeO by introducing Cu deficiencies, which makes it a promising candidate for medium temperature thermoelectric applications.

本文言語English
ページ(範囲)20112-20115
ページ数4
ジャーナルJournal of the American Chemical Society
133
50
DOI
出版ステータスPublished - 2011 12月 21
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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