FigsharePub Date : 2024-06-03DOI: 10.1021/acs.jpcc.4c01658.s001
P. Gluchowski (18717602), M. Chaika (18510860)
{"title":"Crystal-Field StrengthnVariations and Energy Transfernin Cr<sup>3+</sup>-Doped GGG Transparent Nanoceramics","authors":"P. Gluchowski (18717602), M. Chaika (18510860)","doi":"10.1021/acs.jpcc.4c01658.s001","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c01658.s001","url":null,"abstract":"Interpretation of the spectroscopic properties of Cr<sup>3+</sup> ions in garnets is sufficiently complicated by the variationnofnthe crystal-field strength. Occupation by Cr<sup>3+</sup> ions ofnoctahedral sites with different local crystal-field strengths altersntheir emission spectra. In the present work, we report the changesnin the emission spectra of Cr<sup>3+</sup>:GGG nanoceramics synthesizednby the high isostatic pressure (HIP) method. The influence of thenenergy transfer process between Cr<sup>3+</sup> ions on their emissionnspectra is shown. The room temperature excitation and emission spectranare similar for the samples doped with different concentrations ofnCr<sup>3+</sup> ions. At the same time, in the low-temperature emissionnspectra, the impact of <sup>4</sup>T<sub>2g</sub>(<sup>4</sup>F) → <sup>4</sup>A<sub>2g</sub>(<sup>4</sup>F) broadband emission on the overallnCr<sup>3+</sup> emission increases with Cr<sup>3+</sup> concentration.nSince Racah parameters are within the measurement error for Cr<sup>3+</sup>:GGG nanoceramics, the difference in low-temperature emissionnspectra was explained by the increase in energy transfer between Cr<sup>3+</sup> ions, thus increasing the ratio of emission intensity ofnCr<sup>3+</sup> ions in the low crystal field to the total luminescence.","PeriodicalId":522487,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147898024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}