Registered charity number: 207890 www.rsc.org/MaterialsC As featured in: See D.C. RodrÃguez Burbano et al., J. Mater. Chem. C, 2014, 2, 228. Showcasing research from the Department of Chemistry and Biochemistry and Centre for NanoScience Research, Concordia University. Title: The near-IR photo-stimulated luminescence of CaS:Eu 2+ / Dy 3+ nanophosphors. John A. Capobianco and co-workers demonstrate that CaS:Eu 2+ / Dy 3+ nanophosphors generate an intense photo-stimulated red light emission upon NIR excitation at 980 nm. The nanophosphors may have potential applications in optical information storage.