Super-multi-elements doped BiTa7O19:Er3+/Yb3+ with excellent upconversion luminescence. - Li, Lei; Cao, Yongze; Yan, Xianglan; Wang, Xuekai; Zhang, Xizhen; Xu, Sai; Liu, Tianshuo; Chen, Baojiu (Applied Physics A: Materials Science & Processing, 2025)