Haiyan Wang, Jiandong Yao, Qilin Wei, Jialong Zhao*, Bingsuo Zou, and Ruosheng Zeng* 

Simultaneously achieving multicolor emission of down-shifting and up-conversion in Yb3+, Er3+ -codoped Cs2NaGdCl6 double perovskites

Advanced Optical Materials, 2023, 11, 2300694