Host composition dependent tuneable morphology and luminescent property of the CaXSrYBa1-X-YWO4:RE3+ (RE=Pr, Ho, and Er) phosphors

Novel Pr3+, Ho3+, and Er3+ single-doped CaXSrYBa1-X-YWO4 phosphors were successfully prepared via a facile hydrothermal method. The hydrothermal process was conducted in aqueous condition without the use of any organic solvent, surfactant, or catalyst. The effects of doping-host composition and RE3+ doping concentration on the emission intensity were investigated to optimize the luminescent properties of CaXSrYBa1-X-YWO4:RE3+ phosphors. Experimental results demonstrate that the morphologies of the products vary gradually and regularly with the change of the host composition, in which the anisotropic growth played a key role. Moreover, the down-conversion emissions of Pr3+, Ho3+, and Er3+ in CaXSrYBa1-X-YWO4 host were successfully realized. After optimizing the luminescent properties, Ca0.4Sr0.6WO4:0.01Pr(3+), Ca0.8Sr0.2WO4:0.01Ho(3+), and Ca0.6Sr0.4WO4:0.005Er(3+) exhibited optimal luminescent property, with orange, yellowish-green, and green emissions, respectively. (C) 2017 Elsevier B.V. All rights reserved.