화학공학소재연구정보센터
Materials Research Bulletin, Vol.64, 88-92, 2015
Sol-gel synthesis, structure and luminescence properties of Ba2ZnMoO6:Eu3+ phosphors
Double-perovskite Ba2Zn1-xMoO6:xEu(3+) (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) orange-red emitting phosphors were synthesized by using the sol-gel method. The crystalline structure and photoluminescence properties of the phosphors were investigated. The X-ray diffraction (XRD) patterns indicate that the structure of matrix Ba2ZnMoO6 is cubic double-perovskite with space group Fm-3m. The Ba2ZnMoO6:Eu3+ phosphors present an intense broad charge transfer (CT) band absorption in near UV range (370-410 nm), which attributes to the charge transfer state of MoO6, and performs orange-red emission of Eu3+ (D-5(0) -> F-7(1) transition) at around 596 nm. A low concentration quenching occurs in Ba2ZnMoO6:Eu3+ and the optimal doping concentration is about 6 mol%. The Ba2ZnMoO6:Eu3+ phosphors are considered to be a promising orange-red emitting phosphor for near ultraviolet GaN-based white light emitting diode. (C) 2014 Elsevier Ltd. All rights reserved.