Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions

Journal Article · Mon Mar 31 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4870509· OSTI ID:22261613

Mi, Wenlong; Lv, Yanhong ^[1]; Qiu, Pengfei; Shi, Xun; Chen, Lidong ^[1]; Zhang, Tiansong ^[2]

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1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China)
2. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 (China)

Small amount of Se atoms are used to tune the carrier concentrations (n{sub H}) and electrical transport in Ag{sub 2}Se. Significant enhancements in power factor and thermoelectric figure of merit (zT) are observed in the compositions of Ag{sub 2}Se{sub 1.06} and Ag{sub 2}Se{sub 1.08}. The excessive Se atoms do not change the intrinsically electron-conducting character in Ag{sub 2}Se. The detailed analysis reveals the experiment optimum carrier concentration in Ag{sub 2}Se is around 5 × 10{sup 18} cm{sup −3}. We also investigate the temperature of maximum zT and the thermoelectric transport during the first order phase transitions using the recently developed measurement system.

• OSTI ID: 22261613
• Journal Information: Applied Physics Letters, Vol. 104, Issue 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CONCENTRATION RATIO
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PHASE TRANSFORMATIONS
SILVER SELENIDES
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