Luminescence and excitation mechanism of Pr, Eu, Tb and Tm ions implanted into AlN
We have studied the photoluminescence excitation (PLE) and photoluminescence (PL) spectra of Pr3+, Eu3+, Tb3+ and Tm3+ doped AlN thin film on sapphire at 300K. PLE spectra obtained under UV excitation (below bandgap of AlN) in the spectral range 200400nm, reveal two or three bands. Possible assignments of observed exoitation bands are discussed.
doping iii-nitrides rare earth ions optical spectroscopy