Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402661 | Journal of Luminescence | 2009 | 4 Pages |
Abstract
Photoluminescence spectra and decays under pulsed N2 (337Â nm) laser excitation were measured for hydrothermally grown bulk and liquid-phase epitaxy (LPE)-grown film ZnO samples within 9-300Â K. Temperature dependence of integrated spectra over the exciton and visible spectral regions was evaluated using a model involving standard energy barrier processes. Decay curves measured within a broad time window (10Â ns-1Â ms) and with extreme signal/background ratio (five orders of magnitude) point to complex decay mechanism in which the exponential and inverse power-law processes can coexist. There is no straightforward interconnection between the observed temperature dependence of integrated visible photoluminescence intensity and its decay shape over the 9-300Â K temperature interval.
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Authors
M. Nikl, G.P. Pazzi, P. Fabeni, E. Mihokova, J. Pejchal, D. Ehrentraut, A. Yoshikawa, R.T. Williams,