Background illumination enhanced photo-stimulated up-conversion emission in persistent luminescent SrAl2O4:(Eu2+, Dy3+)

Infrared to green conversion of long persistent luminescent Eu2+-Dy3+ Co-doped SrAl2O4

“…So far, some publications have reported the infrared to green conversion of SrAl 2 O 4 :(Eu 2+ , Dy 3+ ) under the excitation at 800 nm [16], 860 nm [17], 980 nm and 1064 nm [18][19][20], but few works have investigated the conversion of SrAl 2 O 4 :(Eu 2+ , Dy 3+ ) under the excitation at a wavelength longer than 1100 nm, which is more significant due to the potential application on silicon solar cells. In this work, the conversion from the infrared photons to the visible photons by SrAl 2 O 4 :(Eu 2+ , Dy 3+ ) phosphors is experimentally demonstrated, especially under the excitation at 1350 nm and 1550 nm.…”