[20a-W833-1~9] 9.1 Dielectrics, ferroelectrics

[20a-W833-3] Effects of Thermally-induced Structural Change in Yttrium Aluminum Perovskite on Its Photoluminescence

〇(DC)Takaaki Morimoto¹, Yoshimichi Ohki^1,2 (1.GSASE, Waseda Univ., 2.RIMST, Waseda Univ.)

Keywords:Photoluminescence,Yttrium aluminum perovskite,Annealing

When yttrium aluminum perovskite (YAP) single crystal is annealed thermally, the XRD pattern inherently due to YAP and photoluminescence (PL) peaks due to Cr³⁺ and Er³⁺ disappear at around 1250 ^oC, but they all reappear at 1300 ^oC. In other words, the two PL peaks and the XRD pattern have very similar dependence on the annealing temperature with correlation coefficients higher than 0.9. Therefore, it is reasonable to assume that disappearance and reappearance of the PL peaks is triggered by the disappearance and reappearance of the crystalline structure of YAP, which gives strong support to our previous conclusion that the two PL peaks appear only when YAP has high crystallinity.