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Scanning electron microscopy (SEM) image of GaN powder doped with 2% Eu. The inset is the SEM image of close view of particles. The scale bar in the inset is 300 nm.
Room temperature PL spectra of GaN powder doped with 1 mol % Eu.
Room temperature PL spectra of GaN powder doped with different Eu concentrations. The spectrum for the undoped GaN (0% Eu) has been scaled for ease of comparison.
CL of the GaN powder doped with 1% Eu at room temperature. Many detailed transitions can be observed in the 530–630 nm range.
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