Cathodoluminescence studies of electron irradiation effects in n-type ZnO

    Authors

    C. Schwarz; Y. Q. Lin; M. Shathkin; E. Flitsiyan;L. Chernyak

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Phys.-Condes. Matter

    Keywords

    ENERGY; Physics, Condensed Matter

    Abstract

    The lifetime of non-equilibrium carriers in n-type unintentionally doped ZnO increases when the sample is exposed to the electron beam of a scanning electron microscope. This is observed by studying the ZnO cathodoluminescence (CL) spectra at different irradiation time durations and temperatures. We found that the decrease in the CL spectra's peak intensity is related to a thermo-activated energy barrier, determined by the calculated activation energy value of 259 +/- 30 meV. This energy value comes close to the defect energy level of the zinc interstitial, which is possibly the nature of the energy barrier responsible for this decrease.

    Journal Title

    Journal of Physics-Condensed Matter

    Volume

    23

    Issue/Number

    33

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    4

    WOS Identifier

    WOS:000294060600006

    ISSN

    0953-8984

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