Abstract
In this work, W6+ ions doped Bi2MoO6:20%Yb3+, 2%Er3+ samples were successfully synthesized by a facile and modified hydrothermal method. The main morphology of Bi2MoO6 samples were hollow microsphere structure assembled by nanosheets. The particle size was slightly increased as enhancing W6+ ions doping concentration to 5%, then decreased as the doping concentration increased. Besides, doping W6+ ions can increase the band gap of products from 2.65 eV to 2.71eV. The upconversion emission intensity of all samples was strongly influenced by the W6+ ions doping concentration. The luminescent intensity enhanced with the doping concentration increasing up to 3%, then decreased when the W6+ ions concentration further increased. Moreover, the intensity of red emission increased by a large margin than that of green-light region. Besides, the lifetime of 4F9/2 states of Er3+ ions for Bi2MoO6:20%Yb3+, 2%Er3+, 3%W6+ (τ655 = 583.64 μs) had significant longer lifetime relative to the Bi2MoO6:20%Yb3+, 2%Er3+ (τ655 = 70.29 μs).
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