Synthesis and Optical Properties of R2O2S:Ln3+ (R = Gd, Y; Ln = Eu, Tb)

From Ln2O2S to Ln10OS14: exploring the sulphur spectrum of trivalent lanthanoid oxysulphides

“…H 2 S or CS 2 ) if the synthesis is carried under flow. 10,14 Ln 2 O 2 S oxysulphides have been synthesized for the majority of the lanthanoids. However, reports on the properties of the pure-phase heavier members (Tb-Lu) are rare.…”

“…Since the first elucidation of the structure of an oxysulphide in 1947, 1 these materials have been extensively studied due to their multitude of technological applications as colour-tunable phosphors, 2 sulphur-tolerant 3 catalyst supports for the water gas shift reaction, 4 and in magnetism 5 and luminescence thermal sensing. [6][7][8][9] While the compositional space is large, Ln 2 O 2 S has been the most widely explored stoichiometry, [10][11][12] and considerably less information is available on its remaining congeners. 13,14 The Ln 2 O 2 S 2 crystal structure was only recently understood owing to the disorder present in the disulphide layer.…”