Pressure Response of the UV-Photoluminescence of ZnO and MgZnO Nanocrystallites

ORAL

Abstract

ZnO and Mg$_{x}$Zn$_{1-x}$O are promising next-generation wide-bandgap semiconductors for high efficiency optical applications. Mg$_{x}$Zn$_{1-x}$O alloys enable the tuning of the photoluminescence\footnote{L. Bergman, et. al, Appl. Phys. Lett. \textbf{88}, 023103 (2006)} [PL] at the range of $\sim $ 3.0 -- 7.0 eV. Additionally, nanomaterial properties under high pressure are of significant importance to the field of devices operating under extreme conditions. Here, we present studies of the pressure response of the UV-PL of ZnO and Mg$_{0.1}$Zn$_{0.9}$O nanocrystallites of size $\sim $ 30 nm. We found that up to 6 GPa the pressure coefficients of ZnO and MgZnO are 23 and 27 meV/GPa, respectively. The pressure coefficient of the ZnO nanocrystallites is similar to that of the bulk ZnO. The higher value found for Mg$_{0.1}$Zn$_{0.9}$O is discussed in terms of the atomic numbers of the cation constituents. L. B. acknowledges NSF-CAREER-DMR-0238845, and DOE--DEFG02-04ER46142. M. M. and L. B. acknowledge the ACS PRF-40749AC10.

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Authors

  • Jesse Huso

  • James C. Evans

    The Evergreen State College, Department of Physics, University of Washington, University of Missouri-St. Louis, Portland State University, Whitman College, University of British Columbia, University of Portland, Dordt College, Calvin College, Evergreen State College, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Stockholm, Sweden, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA, Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA, Army Research Lab, Physics Dept., Washington State University, Chair of the Local Organizing Committee, Department of Physics, University of Puget Sound

  • James C. Evans

    The Evergreen State College, Department of Physics, University of Washington, University of Missouri-St. Louis, Portland State University, Whitman College, University of British Columbia, University of Portland, Dordt College, Calvin College, Evergreen State College, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Stockholm, Sweden, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA, Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA, Army Research Lab, Physics Dept., Washington State University, Chair of the Local Organizing Committee, Department of Physics, University of Puget Sound

  • Leah Bergman

    Physics Dept., University of Idaho, University of Idaho

  • James C. Evans

    The Evergreen State College, Department of Physics, University of Washington, University of Missouri-St. Louis, Portland State University, Whitman College, University of British Columbia, University of Portland, Dordt College, Calvin College, Evergreen State College, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Stockholm, Sweden, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA, Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA, Army Research Lab, Physics Dept., Washington State University, Chair of the Local Organizing Committee, Department of Physics, University of Puget Sound

  • James C. Evans

    The Evergreen State College, Department of Physics, University of Washington, University of Missouri-St. Louis, Portland State University, Whitman College, University of British Columbia, University of Portland, Dordt College, Calvin College, Evergreen State College, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Stockholm, Sweden, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA, Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA, Army Research Lab, Physics Dept., Washington State University, Chair of the Local Organizing Committee, Department of Physics, University of Puget Sound

  • James C. Evans

    The Evergreen State College, Department of Physics, University of Washington, University of Missouri-St. Louis, Portland State University, Whitman College, University of British Columbia, University of Portland, Dordt College, Calvin College, Evergreen State College, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Stockholm, Sweden, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA, Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA, Army Research Lab, Physics Dept., Washington State University, Chair of the Local Organizing Committee, Department of Physics, University of Puget Sound