Substitution priority of Eu
2+
in multi-cation compound Sr
0.8
Ca
0.2
Al
2
Si
2
O
8
and energy transfer
Yang Zhi-Ping
, Li Zhen-Ling
, Wang Zhi-Jun
†
, Li Pan-Lai
‡
, Tian Miao-Miao
, Cheng Jin-Ge
, Wang Chao
(color online) Schematic diagram of red-shift for the emission spectra.