YbCu2Si2–LaCu2Si2 Solid Solutions with Enhanced Thermoelectric Power Factors

Gloria J. Lehr, Donald T. Morelli, Hyungyu Jin, Joseph P. Heremans

    Research output: Research - peer-reviewArticle

    • 2 Citations

    Abstract

    Cryogenic Peltier coolers are ideal for cooling infrared sensors on satellites. To make these thermoelectric devices a realistic option for this application, the efficiency of thermoelectric materials at cryogenic temperatures must be substantially enhanced. Intermediate valence Yb-based compounds have large peaks in the Seebeck coefficient at low temperatures; to optimize these materials this must be understood. We created solid solutions between the intermediate valence compound YbCu2Si2 and an isostructural compound LaCu2Si2 to manipulate the temperature at which the Seebeck coefficient peaks and to maximize zT by reduction of lattice thermal conductivity. An enormous power factor of 110 μW/cm K2 at 100 K and a maximum zT of 0.14 at 125 K were achieved for one of these solid solutions.

    LanguageEnglish (US)
    Pages1663-1667
    Number of pages5
    JournalJournal of Electronic Materials
    Volume44
    Issue number6
    DOIs
    StatePublished - Jun 1 2015

    Profile

    Seebeck effect
    solid solutions
    valence
    Thermoelectric power
    Solid solutions
    Temperature
    Seebeck coefficient
    Cryogenics
    thermoelectric materials
    cryogenic temperature
    coolers
    cryogenics
    thermal conductivity
    cooling
    sensors
    temperature
    Thermal conductivity
    Satellites
    Cooling
    Infrared radiation

    Keywords

    • intermediate valence
    • solid solutions
    • thermoelectric properties
    • YbCu<inf>2</inf>Si<inf>2</inf>

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Materials Chemistry

    Cite this

    YbCu2Si2–LaCu2Si2 Solid Solutions with Enhanced Thermoelectric Power Factors. / Lehr, Gloria J.; Morelli, Donald T.; Jin, Hyungyu; Heremans, Joseph P.

    In: Journal of Electronic Materials, Vol. 44, No. 6, 01.06.2015, p. 1663-1667.

    Research output: Research - peer-reviewArticle

    Lehr, Gloria J. ; Morelli, Donald T. ; Jin, Hyungyu ; Heremans, Joseph P./ YbCu2Si2–LaCu2Si2 Solid Solutions with Enhanced Thermoelectric Power Factors. In: Journal of Electronic Materials. 2015 ; Vol. 44, No. 6. pp. 1663-1667
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    AU - Jin,Hyungyu

    AU - Heremans,Joseph P.

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