Unusual concentration quenching of Sm3+ and Eu3+ doped Sr2SnO4 under UV and NUV excitation

Change curve of the relative emission intensity of Sr2-y/2Sn1-y/2O4:yEu3+ under 394 nm excitation; the insert table is the 5D0→7F2/5D0→7F1 emission intensity ratios.84