Synthesis and evaluation of single layer, bilayer, and multilayer thermoelectric thin films

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The relative efficiency of a thermoelectric material is measured in terms of a dimensionless figure of merit, ZT. Though all known thermoelectric materials are believed to have ZT{le}1, recent theoretical results predict that thermoelectric devices fabricated as two-dimensional quantum wells (2D QWs) or one-dimensional (ID) quantum wires could have ZT{ge}3. Multilayers with the dimensions of 2D QWs have been synthesized by alternately sputtering thermoelectric and barrier materials onto a moving single-crystal sapphire substrate from dual magnetrons. These materials have been used to test the thermoelectric quantum well concept and gain insight into relevant transport mechanisms. If successful, research could lead ... continued below

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43 p.

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Farmer, J.C.; Barbee, T.W. Jr.; Chapline, G.C. Jr.; Olsen, M.L.; Foreman, R.J.; Summers, L.J. et al. January 20, 1995.

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Description

The relative efficiency of a thermoelectric material is measured in terms of a dimensionless figure of merit, ZT. Though all known thermoelectric materials are believed to have ZT{le}1, recent theoretical results predict that thermoelectric devices fabricated as two-dimensional quantum wells (2D QWs) or one-dimensional (ID) quantum wires could have ZT{ge}3. Multilayers with the dimensions of 2D QWs have been synthesized by alternately sputtering thermoelectric and barrier materials onto a moving single-crystal sapphire substrate from dual magnetrons. These materials have been used to test the thermoelectric quantum well concept and gain insight into relevant transport mechanisms. If successful, research could lead to thermoelectric devices that have efficiencies close to that of an ideal Carnot engine. Ultimately, such devices could be used to replace conventional heat engines and mechanical refrigeration systems.

Physical Description

43 p.

Notes

OSTI as DE95017026

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  • Other Information: PBD: 20 Jan 1995

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  • Other: DE95017026
  • Report No.: UCRL-ID--119652
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/93595 | External Link
  • Office of Scientific & Technical Information Report Number: 93595
  • Archival Resource Key: ark:/67531/metadc793432

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  • January 20, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • June 24, 2016, 10:01 p.m.

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Farmer, J.C.; Barbee, T.W. Jr.; Chapline, G.C. Jr.; Olsen, M.L.; Foreman, R.J.; Summers, L.J. et al. Synthesis and evaluation of single layer, bilayer, and multilayer thermoelectric thin films, report, January 20, 1995; California. (digital.library.unt.edu/ark:/67531/metadc793432/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.