{"title":"Study of Charge Transfer Green Luminescence in Tb3+ Activated BaSrLa4O8 Nanophosphor for Advanced Indoor Lighting Applications","authors":"Manav Kaushik, Ritu Kataria, Pallavi Bhardwaj, Mukesh Kumar","doi":"10.1134/s0036023624600242","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A Tb<sup>3+</sup>-activated orthorhombic BaSrLa<sub>4</sub>O<sub>8</sub> nanocrystal system with good green luminescence was prepared using the energy-saving combustion method. Its crystal structure is orthorhombic, it belongs to the <i>Pnma</i> (162) space group, and its particle shape and diameter range from 42 nm to 66 nm. Morphological aspects were examined by scanning and transmission electron microscopies. When exposed to ultra-violet radiation, the nanocrystal emits vibrant green light with a wavenumber of 18 348 cm<sup>–1</sup> due to the change of electronic state <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub>. The effect of energy transfer is also demonstrated. The maximum emission intensity was observed at 5.0 mol % Tb<sup>3+</sup> concentration when excited at 281 nm. This phenomenon can be attributed to the concentration-quenched <i>d</i>–<i>d</i> interaction leading to decreased luminescence intensity. According to the chromaticity diagram, the composite color falls in the green region and the relative color temperature of the optimized sample BaSrLa<sub>3.8</sub>Tb<sub>0.2</sub>O<sub>8</sub> is measured at 5688 K. These nanocrystals are especially best for producing white light for advanced optoelectronic applications.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"100 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1134/s0036023624600242","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
A Tb3+-activated orthorhombic BaSrLa4O8 nanocrystal system with good green luminescence was prepared using the energy-saving combustion method. Its crystal structure is orthorhombic, it belongs to the Pnma (162) space group, and its particle shape and diameter range from 42 nm to 66 nm. Morphological aspects were examined by scanning and transmission electron microscopies. When exposed to ultra-violet radiation, the nanocrystal emits vibrant green light with a wavenumber of 18 348 cm–1 due to the change of electronic state 5D0 → 7F2. The effect of energy transfer is also demonstrated. The maximum emission intensity was observed at 5.0 mol % Tb3+ concentration when excited at 281 nm. This phenomenon can be attributed to the concentration-quenched d–d interaction leading to decreased luminescence intensity. According to the chromaticity diagram, the composite color falls in the green region and the relative color temperature of the optimized sample BaSrLa3.8Tb0.2O8 is measured at 5688 K. These nanocrystals are especially best for producing white light for advanced optoelectronic applications.
期刊介绍：
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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