Luminescence of a ZnO:Ga Crystal upon Excitation in Vacuum UV Region

TL;DR

This study investigates the spectral and kinetic luminescence properties of a ZnO:Ga crystal under vacuum UV excitation, revealing detailed exciton and visible luminescence characteristics at various temperatures.

Contribution

It provides new spectral-kinetic data on ZnO:Ga luminescence under vacuum UV excitation, including temperature-dependent decay times and excitation spectra.

Findings

Exciton luminescence line at 3.356 eV with 7.2 meV width and 360 ps decay at 8 K

Wide visible band at ~2.1 eV with long decay at 8 K and nanosecond decay at 300 K

Luminescence excitation spectra measured from 4 to 12.5 eV

Abstract

The spectral--kinetic characteristics of a ZnO:Ga single crystal upon excitation in the vacuum UV region have been studied. At a temperature of 8 K, the exciton luminescence line peaking at 3.356 eV has an extremely small half-width (7.2 meV) and a short decay time (360 ps). In the visible range, a wide luminescence band peaking at ~2.1 eV with a long luminescence time at 8 K and a decay time in the nanosecond range at 300 K is observed. The luminescence excitation spectra of ZnO:Ga have been measured in the range from 4 to 12.5 eV