Synthesis and Up-conversion Luminescence of Yb~(3+)/Ln~(3+) (Ln = Er, Tm, Ho)Co-Doped Strontium Cerate by Pechini Method

摘要

Novel up-conversion (UC) luminescent nanopowders, Sr_2CeO_4: Yb~(3+),Ln~(3+) (Ln = Er, Tm, Ho) were prepared with Pechini method. The Sr_2CeO_4:Yb~(3+),Ln~(3+) (Ln = Er, Tm, Ho) nanopowders had an orthorhombic crystal structure, and showed olive-like morphology with the length of about 260 nm and width of about 130 nm. Under 980 nm lazer excitation, the Sr_2CeO_4:Yb~(3+)/Er~(3+), Sr_2CeO_4:Yb~(3+)/Tm~(3+), and Sr_2CeO_4: Yb~(3+)/HO_(3+) nanophosphors exhibit strong green, blue, and green UC luminescence, respectively. The luminescence mechanisms for the doped lanthanide ions were thoroughly analyzed.