Decay kinetics of the defect-based visible luminescence in ZnO

作者：Nikl M^*; Pazzi G P; Fabeni P; Mihokova E; Pejchal J; Ehrentraut D; Yoshikawa A; Williams R T

来源：Journal of Luminescence, 2009, 129(12): 1564-1567.

DOI：10.1016/j.jlumin.2009.04.047

• Luminescence
• ZnO crystal
• LPE film
• Fast scintillator

Photoluminescence spectra and decays under pulsed N(2) (337 nm) laser excitation were measured for hydrothermally grown bulk and liquid-phase epitaxy (LPE)-grown film ZnO samples within 9-300 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 (10 ns-1 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 9-300K temperature interval.

• 出版日期2009-12