A Study of Preparation of Luminescent Phosphors Characterization Techniques and Lanthanide Doped Nanophosphors

Physics

The aim of this study is to the best of one’s knowledge, this is the first time that blue light emitting flexible AC powder electroluminescence (ACPEL) devices have been fabricated with undoped and Europium incorporated ZnGa2O4 as well as undoped CaWO4 phosphors and their characteristics were tested. Technologically important materials are the ones which are directly or indirectly used for the advancement of the existing technology or development of new technology. It can be achieved through, improvement of performance, enhancement of activity or by modifying the overall behavior of a device in terms of accuracy, cost, handling and safety etc. In the recent years, an extensive advancement in the field of phosphors has been explored by introducing transition metal ions and trivalent rare earth ions (lanthanides) as luminescent centers (dopants) in different host matrices to produce phosphors for solid state lighting applications. In general, most of the phosphors are usually made up of a host material which consists of a family of sulphides, phosphates, aluminates, oxides, molybdates, tungstates, silicates and so on with or without suitable dopant (transition metal ions and lanthanides). The luminescent host lattice is normally an insulator or wide bandgap semiconductor and it serves to accommodate the dopant ions. The host compound also controls few of the physical and chemical behaviors of the luminescent phosphors such as emission intensity and lifetime properties. In most cases, the dopant ions or activator ions are usually present in concentration levels varying from a few ppm up to one to five moles of the host lattice.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.