Y <sub>2</sub> O <sub>3</sub> :Yb <sup>3+</sup> , Tm <sup>3+</sup> /ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyesYuehui Tai, Caihong Li, Jinlong Sun et al.|RSC Advances|2021Cited by 29