AVS 65th International Symposium & Exhibition
    Actinides and Rare Earths Focus Topic Thursday Sessions
       Session AC-ThP

Paper AC-ThP2
Luminescence Characteristics of (Gd0.85-xYb0.15)NbO4:Erx3+ Phosphors

Thursday, October 25, 2018, 6:00 pm, Room Hall B

Session: Actinides and Rare Earths Poster Session
Presenter: DongGyu Lee, Silla University, Republic of Korea
Authors: S.S. Yi, Silla University, Republic of Korea
D.G. Lee, Silla University, Republic of Korea
Correspondent: Click to Email
Gd(0.85-x)NbO4 : Yb3+0.15, Er3+x (x= 0.03, 0.06, 0.09, 0.12 and 0.15) phosphors were synthesized by the solid state reaction method. Er3+ concentrations were changed from 0.03 to 0.15 mol for the fixed Yb3+concentration at 0.15 mol. The crystalline structures of the phosphors were investigated by X-ray diffraction. The particle size of phosphors was around 140 ~ 320 nm and shape were angular oval observed by scanning electron microscopy. The photoluminescence emission based on the blue emission near 471 nm, green emission near 596 nm and red emission near 621 nm were observed and the highest emission intensity occurred for the sample Yb0.15 Er0.09. Also, under the 980 nm excitation, Er3+, Yb3+ co-doped GdNbO4 phosphors appeared the up-conversion emission based on the green emission near 535 nm and 556 nm radiated by 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions and red emission about 657 nm and 675 nm radiated by 4F9/2 → 4I15/2 transition, which assigned to the intra 4f transitions of Er3+ ions.