A host sensitized reddish-orange Gd_2MoO_6:Sm~(3+) phosphor for light emitting diodes

摘要

An intense reddish-orange phosphor, Gd_2MoO_6: Sm~(3+), was developed by solid state chemistry. The photoluminescence excitation and emission spectra, concentration effect are investigated. The results show an efficient energy transfer from MoO_66~ group to Sm~(3+) occurs and Sm~(3+) ion emits an intense reddish-orange light with high color purity and an excellent reproduction quality of optical properties. These results demonstrate that Sm~(3+) ion with low 4/-4/ absorption efficiency in near ultraviolet region can play a role of activator in narrow reddish-orange emitting phosphor potentially useful in ~370 nm GaN-based light emitting diode through efficient energy feeding by charge transfer absorption of MoO_6~(6-) group