Tuesday, 2 October 2018: 13:30
Universal 11 (Expo Center)
Transition metal ions with the 3d3 electronic configuration (such as V2+, Cr3+, Mn4+, Fe5+) are widely used in various optical applications. In particular, the Mn4+ ions play a major role in red phosphors used in white light emitting diodes. Increased interest to these systems is justified by growing number of publications focused on the Mn4+ -based phosphors. However, quite often their spectroscopic properties are misinterpreted and physically incorrect statements can be met in the literature. Therefore, there is an urge need in a detailed and thorough review of the basic properties of the 3d3 electronic configuration, which would include the origin of the electronic energy levels, their degeneracy, symmetry, splitting patterns in crystal fields etc. This is the main goal of this presentation: to tutorize the fundamental optical properties of the 3d3 electronic configuration and to clear up some common misconceptions that we have encountered in the archival literature that pertains to the spectroscopic properties of the ions with the same electron configuration. The methods to properly describe the optical spectra of these systems are given. It is hoped that such systematic presentation of spectroscopic properties of the d3 ions and their variation from the free state to the crystalline solids will be useful for many researchers – mainly experimentalists – actively working in the field and will help them avoiding many mistakes when presenting their experimental results.