2:00 PM - 2:15 PM [18p-G204-4] Investigation of carrier trapping for Ca2SnO4:Ln(Ln=Eu3+, Tb3+) persistent phosphor by vacuum referred binding energy diagram 〇Takayuki Tokunaga1, Ueda Jumpei1, Tanabe Setsuhisa1 (1.Kyoto Univ.)