Fig. 4: Luminescent and afterglow behaviors of CsCdCl3:x%Br and CsCdCl3:x%Sn.

a Afterglow photographs for CsCdCl3:x%Br, A (x = 0), C (x = 0.2%), D (x = 0.5%), E (x = 0.8), F (x = 1), G (x = 3), H (x = 5), J (x = 10) and K (x = 15). CIE coordinate diagram of CsCdCl3:0.8%Br in temperature-responsive b prompt and c delayed mode. d Temperature-dependent PL emission color of CsCdCl3:0.8%Br were controlled by switching on/off the 254 nm UV lamp. e Afterglow photographs for CsCdCl3:x%Sn, L (x = 1), M (x = 3), O (x = 5), S (x = 10) and T (x = 15).