Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4870509
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Funding
- National Basic Research Program of China (973-Program) [2013CB632501]
- National Natural Science Foundation of China (NSFC) [51121064, 51222209]
- Nanotechnology Project of Shanghai Science and Technology Committee [11nm0502800]
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Small amount of Se atoms are used to tune the carrier concentrations (n(H)) and electrical transport in Ag2Se. Significant enhancements in power factor and thermoelectric figure of merit (zT) are observed in the compositions of Ag2Se1.06 and Ag2Se1.08. The excessive Se atoms do not change the intrinsically electron-conducting character in Ag2Se. The detailed analysis reveals the experiment optimum carrier concentration in Ag2Se is around 5 x 10(18) cm(-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. (C) 2014 AIP Publishing LLC.
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