Considering lanthanide applications in phosphors, researchers focus on luminescent properties, which make these compounds unique among other luminescence centres. Moreover, the use of lanthanides in phosphors accounts for approximately 3% of the total market share 1. The global value of lanthanide-containing products estimated in 2014 was 1.5–2 trillion dollars 2, and this number has been continuously increasing since that time. Lanthanides have revolutionised the modern science and technology and are present in almost any device 1. Compared to the parametrisation of absorption spectra, the described method is more accurate, can be applied to any material form, and requires a single excitation spectrum. This approach facilitates an effortless derivation of the Ω 6 intensity parameter, which is challenging to compute precisely by Krupke’s parametrisation of the emission spectrum and, therefore, often omitted in published research papers. It uses the integrated intensities of the 7F 0 → 5D 2, 7F 0 → 5D 4, and 7F 0 → 5L 6 transitions in the excitation spectrum for estimation and the integrated intensity of the 7F 0 → 5D 1 magnetic dipole transition for calibration. A self-referenced technique for computing Judd–Ofelt intensity parameters from the excitation spectra of Eu 3+-activated luminescent materials is presented in this study along with an explanation of the parametrisation procedure and free user-friendly web application. Judd–Ofelt theory is a cornerstone of lanthanides’ spectroscopy given that it describes 4f n emissions and absorptions of lanthanide ions using only three intensity parameters.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |