Luminescence, energy transfer, colour modulation and up-conversion mechanisms of Yb<sup>3+</sup>, Tm<sup>3+</sup> and Ho<sup>3+</sup> co-doped Y<sub>6</sub>MoO<sub>12</sub>
Peng Guo, Jiaxuan Wang, Chuan Liao, Haifeng Zhou, Dapeng Huang, Guangjun Zhou, Xiaoqiang Yu, Jifan Hu
Abstract
) nanocrystals were excited by near-infrared photons and emitted photons distributed in blue, green, and red bands with a wide colour gamut, and even white colour, by optimising the relative doping concentrations of the activator ions. The energy conversion mechanism in the up-conversion process was studied using power-dependent luminescence and is depicted in the energy level diagram. In addition, 70% of the luminescence intensity of YMO can be preserved after annealing at 700 °C, and the temperature sensing was tested in the range 298-498 K. These merits of multicolour emissions in the visible region and good stability endow the as-prepared nanocrystals with potential applications in the fields of optical data storage, encryption, sensing, and other multifunctional photonic technologies.