Broadband Cr3+-sensitized upconversion luminescence of LiScSi2O6:Cr3+/Er3+

Broadband sensitization is an effective strategy to enhance the upconversion luminescence(UCL) of lanthanide ions.Herein,novel UC materials LiScSiO:Cr/Er(LSS:Cr/Er) were synthesized by high-temperature solid state reaction and their luminescent properties were investigated.LSS:Cr/Erhas the broadband absorption in the spectral range of 600-800 nm,and meanwhile shows green UC emissions of Erupon pumping Crby the 690 nm laser.The UCL of LSS:Cr/Erbelongs to the twophoton process and is attributed to the energy transfer upconversion mechanism.The effects of the Crand Erconcentration as well as the Ybintroduction were also studied.LSS:Cr/Yb/Erexhibits the interesting dual-mode UCL,capable of generating the UCL of Crupon pumping Ybions and the UCL of upon pumping Crions.This research might promote the development of novel broadband Cr-sensitized UC materials.