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Thermal conductivity of bulk ZnO after different thermal treatments

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Abstract

Thermal conductivities (κ) of melt-grown bulk ZnO samples thermally treated under different conditions were measured using scanning thermal microscopy. Samples annealed in air at 1050°C for 3 h and treated with N-plasma at 750°C for 1 min. exhibited κ=1.35±0.08 W/cm-K and κ=1.47±0.08 W/cm-K, respectively. These are the highest values reported for ZnO. Atomic force microscopy (AFM) and conductive-AFM measurements revealed that surface carrier concentration as well as surface morphology affected the thermal conductivity.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Virginia Commonwealth University, 23284-3072, Richmond, VA

    Ü. Özgür, X. Gu, S. Chevtchenko, J. Spradlin, S. -J. Cho & H. Morkoç

  2. Physics Department and New York State Center for Advanced Technology in Ultrafast Photonic Materials and Applications, Brooklyn College of the City University of New York, 11210, Brooklyn, NY

    F. H. Pollak

  3. Physics Department, Duke University, 27708, Durham, NC

    H. O. Everitt

  4. Cermet, Inc., 30318, Atlanta, GA

    B. Nemeth & J. E. Nause

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  1. Ü. Özgür
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  2. X. Gu
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  3. S. Chevtchenko
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  4. J. Spradlin
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  5. S. -J. Cho
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  6. H. Morkoç
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  8. H. O. Everitt
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  9. B. Nemeth
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Özgür, Ü., Gu, X., Chevtchenko, S. et al. Thermal conductivity of bulk ZnO after different thermal treatments. J. Electron. Mater. 35, 550–555 (2006). https://doi.org/10.1007/s11664-006-0098-9

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  • DOI: https://doi.org/10.1007/s11664-006-0098-9

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