Optical studies of Y₃£¨Al,Ga£©₅O₁₂:Ce³⁺,Cr³⁺,Nd³⁺ nano-phosphors obtained by the Pechini method

À´Ô´ÆÚ¿¯£ºJournal of Rare Earths2019ÄêµÚ11ÆÚ

ÂÛÎÄ×÷ÕߣºZ.Dai V.Boiko M.Markowska A.Gerus K.Grzeszkiewicz J.H?ls? M.L.Saladino D.Hreniak

ÎÄÕÂÒ³Â룺1132 - 1136

Õª    Òª£ºThe Y3£¨AI,Ga£©₅O₁₂:Ce³⁺,Cr³⁺,Nd³⁺£¨YAGG£© nano-phosphors with homogeneous particle-size distribution,low aggregation and average crystalline size of about 65 nm were obtained using a modified Pechini method.Only slight aggregation of the crystallites occurs after post-annealing at 1100¡æ.The intense Ce³⁺bands in the excitation spectra of the Ce³⁺,Cr³⁺,Nd³⁺co-doped materials monitoring the Cr³⁺ emission at 690 nm indicate energy transfer from Ce³⁺ to Cr³⁺.Weak Nd³⁺ lines are observed,as well.In addition,the emission of Nd³⁺at 1060 nm with excitation of Ce³⁺ and Cr³⁺ confirms the Ce³⁺/Cr³⁺to Nd³⁺energy transfer.The short average luminescence decay times for the Ce³⁺ emission indicate the Ce³⁺/Cr³⁺to Nd³⁺energy transfer.Eventually,the Y₃£¨AI,Ga£©₅O₁₂:Ce³⁺,Cr³⁺,Nd³⁺ nano-phosphors exhibit persistent luminescence originating from the 4f³¡ú4f³ transitions of Nd³⁺ which matches well to the first biological window to be used in bioimaging applications.