Electrical Transport Properties of Type-VIII Sn-Based Single-Crystalline Clathrates (Eu/Ba)8Ga16Sn30Prepared by Ga Flux Method
Year: 2017
Type: article
Abstract: Single-crystalline samples of Eu/Ba-filled Sn-based type-VIII clathrate are prepared by the Ga flux method with different stoichiometric ratios. The electrical transport properties of the samples are optimized by Eu doping. Results indicate that Eu atoms tend to replace Ba atoms. With the increase of the Eu initial content, the carrier density increases and the carrier mobility decreases, which leads to an increase of the Seebeck coefficient. By contrast, the electrical conductivity decreases. Finally, the sample with Eu initial content of behaves with excellent electrical properties, which shows a maximal power factor of 1.51 mW m K at 480 K, and the highest ZT achieved is 0.87 near the temperature of 483 K.
Source: Chinese Physics Letters
Authors: Shu-Ping Deng, Feng Cheng, De-Cong Li, Yu Tang, Zhong Chen, Lan-Xian Shen, Hong-Xia Liu, Pei-Zhi Yang, Shu-Kang Deng
Institutions: Yunnan Normal University, Yunnan Open University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2604951055