Luminescent characteristics and energy transfer of Ca2BO3Cl:Sm3+, Eu3+ red phosphor

Abstract A novel red phosphor, Ca 2 BO 3 Cl:Sm 3+ , Eu 3+ , is synthesized by a high temperature solid-state method. The red emission intensity of Eu 3+ is enhanced by codoping Sm 3+ ions, with increasing Eu 3+ doping content, the energy transfer efficiency (Sm 3+ → Eu 3+ ) gradually increases to 55%. Moreover, The doped Sm 3+ is found to be efficient to extend and strengthen the absorption of near-UV light with wavelength of 400–405 nm. The effect of the molar concentration of Eu 3+ on the chromaticity coordinates of Ca 2 BO 3 Cl:Sm 3+ , Eu 3+ is investigated, and the results are compared to those of the conventional red phosphor Y 2 O 2 S:Eu 3+ .