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

Abstract

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.

Authors:
;  [1]; ; ;  [1];  [2]
  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)
Publication Date:
OSTI Identifier:
22261613
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CONCENTRATION RATIO; ELECTRIC CONDUCTIVITY; PHASE TRANSFORMATIONS; SILVER SELENIDES; THERMOELECTRIC MATERIALS

Citation Formats

Mi, Wenlong, Lv, Yanhong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, Qiu, Pengfei, Shi, Xun, Chen, Lidong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, and Zhang, Tiansong. Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions. United States: N. p., 2014. Web. doi:10.1063/1.4870509.
Mi, Wenlong, Lv, Yanhong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, Qiu, Pengfei, Shi, Xun, Chen, Lidong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, & Zhang, Tiansong. Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions. United States. https://doi.org/10.1063/1.4870509
Mi, Wenlong, Lv, Yanhong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, Qiu, Pengfei, Shi, Xun, Chen, Lidong, CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050, and Zhang, Tiansong. 2014. "Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions". United States. https://doi.org/10.1063/1.4870509.
@article{osti_22261613,
title = {Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions},
author = {Mi, Wenlong and Lv, Yanhong and CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 and University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049 and Qiu, Pengfei and Shi, Xun and Chen, Lidong and CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 and Zhang, Tiansong},
abstractNote = {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.},
doi = {10.1063/1.4870509},
url = {https://www.osti.gov/biblio/22261613}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 13,
volume = 104,
place = {United States},
year = {Mon Mar 31 00:00:00 EDT 2014},
month = {Mon Mar 31 00:00:00 EDT 2014}
}