One-pot synthesis of single phase Eu2+-activated MSi2O2N2 (M = Sr, Ba) by Controlling precursors and oxygen/nitrogen ratio

Color-tunable emissions realized by Tb3+ to Eu3+ energy transfer in ZnGdB5O10 under near-UV excitation

“…The most intense emission line observed in the green region (∼542 nm) can be assigned to the transitions from the 5 D 4 to 7 F 5 level and the relatively weaker emission lines around 487, 587 and 623 nm originate from the 5 D 4 to 7 F 6 , 7 F 4 and 7 F 3 transitions, respectively. 27,28 The overall emission intensity increases with the Tb 3+ concentration and reaches the maximum value when x = 0.80, and then emission quenching is detected. A similar tendency in the emission intensity is observed when excited at 213 nm as shown in Fig.…”