Title of article :
Yellow lighting upconversion from Yb3+/Ho3+ co-doped CaMoO4
Author/Authors :
Chung، نويسنده , , Jun-Ho and Ryu، نويسنده , , Jeong Ho and Lee، نويسنده , , Sang-Yeop and Lee، نويسنده , , Jeong-Hoon and Choi، نويسنده , , Bong Geun and Shim، نويسنده , , Kwang Bo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
Yellow upconversion (UC) luminescence is observed in Ho3+/Yb3+ co-doped CaMoO4 synthesized by complex citrate-gel method. Under 980 nm excitation, Ho3+/Yb3+ co-doped CaMoO4 exhibited yellow emission based on green emission near 543 nm generated by 4F4, 5S2 → 5I8 transition and strong red emission around 656 nm generated by 5F5 → 5I8 transition, which are assigned to the intra 4f transitions of Ho3+ ions. The optimum doping concentration of Ho3+ and Yb3+ was investigated for highest upconversion luminescence. Based on pump power dependence, upconversion mechanism of Ho3+/Yb3+ co-doped CaMoO4 was studied in detail.
Keywords :
D. Optical properties , D. Luminescence , A. Optical materials
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
