Journal of the American Ceramic Society, Vol.97, No.6, 1899-1904, 2014
Synthesis and Up-conversion Luminescence of Yb3+/Ln3+(Ln=Er, Tm, Ho) Co-Doped Strontium Cerate by Pechini Method
Novel up-conversion (UC) luminescent nanopowders, Sr2CeO4:Yb3+,Ln3+ (Ln=Er, Tm, Ho) were prepared with Pechini method. The Sr2CeO4:Yb3+,Ln3+ (Ln=Er, Tm, Ho) nanopowders had an orthorhombic crystal structure, and showed olive-like morphology with the length of about 260nm and width of about 130nm. Under 980nm lazer excitation, the Sr2CeO4:Yb3+/Er3+, Sr2CeO4:Yb3+/Tm3+, and Sr2CeO4:Yb3+/Ho3+ nanophosphors exhibit strong green, blue, and green UC luminescence, respectively. The luminescence mechanisms for the doped lanthanide ions were thoroughly analyzed.