Upconversion luminescence of cubic and hexagonal structured SrTa4O11:Er3+/Yb3+ phosphors. - Wang, Xuekai; Cao, Yongze; Yan, Xianglan; Xu, Sai; Zhang, Jinsu; Liu, Tianshuo; Chen, Baojiu (Dalton Transactions: An International Journal of Inorganic Chemistry, 2024)