Debarati Das , Annu Balhara , Santosh K. Gupta , Kathi Sudarshan
{"title":"氧空位缔合引起了Eu3+掺杂CeO2与Sc3+和La3+共掺杂的光致发光变化","authors":"Debarati Das , Annu Balhara , Santosh K. Gupta , Kathi Sudarshan","doi":"10.1016/j.materresbull.2025.113303","DOIUrl":null,"url":null,"abstract":"<div><div>Defects recently have been found to enrich the materials with various functional properties if they are controlled and present in moderate amounts. Engineering defects through aliovalent doping was found to be one of the most sought out strategies in CeO<sub>2</sub> for various technological applications. The emission from Eu<sup>3+</sup> is sensitive to its local surroundings. In this study, 20 % (La<sup>3+</sup>+Sc<sup>3+</sup>) codoped CeO<sub>2</sub>:4 % Eu<sup>3+</sup> samples with varying relative amounts of La<sup>3+</sup> and Sc<sup>3+</sup> are prepared and their emission characteristics are studied. Keeping the total trivalent content constant allowed understanding the subtle effect of vacancy distribution vis-à-vis Eu<sup>3+</sup> and their influence of emission characteristics. The study shows that smaller trivalent ion scavenges the oxygen vacancies away from Eu<sup>3+</sup> while larger trivalent ions facilitate the association of oxygen vacancies with Eu<sup>3+</sup>. The distribution of oxygen vacancies relative to Eu<sup>3+</sup> allowed to tune color of emission and also enhanced emission lifetimes.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113303"},"PeriodicalIF":5.7000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Oxygen vacancy association induced changes in photoluminescence of Eu3+ doped CeO2 codoped with Sc3+ and La3+\",\"authors\":\"Debarati Das , Annu Balhara , Santosh K. Gupta , Kathi Sudarshan\",\"doi\":\"10.1016/j.materresbull.2025.113303\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Defects recently have been found to enrich the materials with various functional properties if they are controlled and present in moderate amounts. Engineering defects through aliovalent doping was found to be one of the most sought out strategies in CeO<sub>2</sub> for various technological applications. The emission from Eu<sup>3+</sup> is sensitive to its local surroundings. In this study, 20 % (La<sup>3+</sup>+Sc<sup>3+</sup>) codoped CeO<sub>2</sub>:4 % Eu<sup>3+</sup> samples with varying relative amounts of La<sup>3+</sup> and Sc<sup>3+</sup> are prepared and their emission characteristics are studied. Keeping the total trivalent content constant allowed understanding the subtle effect of vacancy distribution vis-à-vis Eu<sup>3+</sup> and their influence of emission characteristics. The study shows that smaller trivalent ion scavenges the oxygen vacancies away from Eu<sup>3+</sup> while larger trivalent ions facilitate the association of oxygen vacancies with Eu<sup>3+</sup>. The distribution of oxygen vacancies relative to Eu<sup>3+</sup> allowed to tune color of emission and also enhanced emission lifetimes.</div></div>\",\"PeriodicalId\":18265,\"journal\":{\"name\":\"Materials Research Bulletin\",\"volume\":\"185 \",\"pages\":\"Article 113303\"},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2025-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Research Bulletin\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S002554082500011X\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/10 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S002554082500011X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/10 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Oxygen vacancy association induced changes in photoluminescence of Eu3+ doped CeO2 codoped with Sc3+ and La3+
Defects recently have been found to enrich the materials with various functional properties if they are controlled and present in moderate amounts. Engineering defects through aliovalent doping was found to be one of the most sought out strategies in CeO2 for various technological applications. The emission from Eu3+ is sensitive to its local surroundings. In this study, 20 % (La3++Sc3+) codoped CeO2:4 % Eu3+ samples with varying relative amounts of La3+ and Sc3+ are prepared and their emission characteristics are studied. Keeping the total trivalent content constant allowed understanding the subtle effect of vacancy distribution vis-à-vis Eu3+ and their influence of emission characteristics. The study shows that smaller trivalent ion scavenges the oxygen vacancies away from Eu3+ while larger trivalent ions facilitate the association of oxygen vacancies with Eu3+. The distribution of oxygen vacancies relative to Eu3+ allowed to tune color of emission and also enhanced emission lifetimes.
期刊介绍：
Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.
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