The effect of different species of gases on material properties of Eu³⁺ doped Y₂O₂S thin films phosphor deposited by pulsed laser deposition method

Full text: Y₂O₂S nanocrystals doped with trivalent RE ions have particularly attracted considerable interest in terms of high chemical durability and thermal stability. It has been widely investigated as the host for RE ions for optical application. It has a broad transparency range (0.2- 8μm) with a band gap of between 5.6-5.8 eV, a high refractive index, better thermal conductivity, and low photon energy that makes it an attractive choice as host materials. Synthesis of rare earth doped Y₂O₂S based nanophosphor has been accomplished through a variety of techniques such as sol gel method, co-precipitation etc. Among various methods, combustion method has been studied extensively due to its simplicity and easiness to control the particle size of the products. In this study Y₂O₂S: Eu³⁺ thin films have been deposited with the pulsed laser deposition technique under different species of gases and the material properties dependence of Y₂O₂S:Eu³⁺ were reported. The deposition was carried out under vacuum, argon and oxygen atmosphere. (author)