The effect of deposition time on the structural, morphological and luminescence properties of Y2O2S:Eu3+ thin films prepared by pulsed laser deposition

Control of Eu Oxidation State in Y2O3−xSx:Eu Thin-Film Phosphors Prepared by Atomic Layer Deposition: A Structural and Photoluminescence Study

“…Since then, it has been studied and used in luminescence applications such as light-emitting diodes [24] and field emission displays [4]. During the last decade, Y2O2S doped with europium was successfully grown by several techniques including pulsed laser deposition [16], hydrothermal method [5], sol-gel template method [19], and decomposition method [17]. However, when using these growth techniques, the europium dopant tends to oxidize to its trivalent form Eu 3+ , as the divalent Eu 2+ is unlikely to exist in Y2O2S, according to energy level considerations.…”

“…Because Eu 2+ is highly dependent on the environment, each material emits in a specific range [7]. Y 2 O 2 S:Eu is a well-known phosphor which has mainly been investigated as a host for Eu 3+ in order to obtain red emission [5,[16][17][18][19][20][21]. This is supported by the similar dimensions of Eu 3+ and Y 3+…”

Pr3+-doped Y2O3 nanocrystals embedded in Y2O3 thin films as a sandwich-like structure prepared by pulsed laser deposition

“…Furthermore, these composite films represent an additional solution to the limitation of RE doping concentration in glasses related to low solubility rates and strong tendency to form clusters, which ultimately leads to fluorescence quenching [20,21,22]. In this context, several methods are available to prepare these composite films, such as laser molecular beam epitaxy [23,24], spin coating [25,26], spray pyrolysis [27,28], radio frequency magnetron sputtering [29,30], or pulsed laser deposition (PLD) [31,32,33]. Among these, PLD represents a promising technology that provides a remarkable stoichiometric transfer from a pre-pressed solid target to the so-obtained thin film on a substrate.…”