{"title":"Simultaneous Tailoring of Robust Anti‐Thermal Quenching and High Thermometric Sensitivity in Lanthanide‐Doped Cs2NaYF6 Double Perovskites","authors":"Kejie Li, Mochen Jia, Jiaqi Zhao, Gaixin Zhang, Dongxu Guo, Zhiying Wang, Zuoling Fu","doi":"10.1002/lpor.202500662","DOIUrl":null,"url":null,"abstract":"Lanthanide‐doped double perovskites have emerged as promising candidates for remote optical thermometry owing to their pronounced thermally quenched photoluminescence. However, substantial emission attenuation at elevated temperatures poses a challenge to achieving high measurement precision. Herein, a facile solid‐state synthesis of efficient lanthanide‐doped fluoride double perovskites Cs<jats:sub>2</jats:sub>NaYF<jats:sub>6</jats:sub>, is reported presenting robust anti‐thermal quenching behavior while maintaining enhanced thermal sensitivity through partial substitution of Na<jats:sup>+</jats:sup> with Li<jats:sup>+</jats:sup>. Li<jats:sup>+</jats:sup> doping induces lattice contraction and increased stiffness, reducing phonon energy and suppressing electron–phonon coupling, thereby enhancing emission intensity and mitigating the thermal quenching of Er<jats:sup>3+</jats:sup>. Meanwhile, Li<jats:sup>+</jats:sup>‐induced local symmetry distortion around Er<jats:sup>3+</jats:sup> leads to further Stark splitting of <jats:sup>2</jats:sup>H<jats:sub>11/2</jats:sub>, promoting the thermally assisted population of green‐emitting levels, which retain 84% of their initial intensity at 523 K. In contrast, the red emission remains unaffected due to the large energy gap between adjacent levels. Consequently, both thermally coupled and non‐thermally coupled thermometric sensitivity are enhanced, with a maximum improvement of up to 6‐fold, leading to a substantial reduction in temperature uncertainty at high temperatures. Furthermore, the practical applicability of flexible polydimethylsiloxane‐based optical fiber and thin‐film temperature sensors is demonstrated. This provides insights into simultaneously optimizing the intensity and sensitivity of luminescent thermometers.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 1","pages":""},"PeriodicalIF":9.8000,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Laser & Photonics Reviews","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1002/lpor.202500662","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Lanthanide‐doped double perovskites have emerged as promising candidates for remote optical thermometry owing to their pronounced thermally quenched photoluminescence. However, substantial emission attenuation at elevated temperatures poses a challenge to achieving high measurement precision. Herein, a facile solid‐state synthesis of efficient lanthanide‐doped fluoride double perovskites Cs2NaYF6, is reported presenting robust anti‐thermal quenching behavior while maintaining enhanced thermal sensitivity through partial substitution of Na+ with Li+. Li+ doping induces lattice contraction and increased stiffness, reducing phonon energy and suppressing electron–phonon coupling, thereby enhancing emission intensity and mitigating the thermal quenching of Er3+. Meanwhile, Li+‐induced local symmetry distortion around Er3+ leads to further Stark splitting of 2H11/2, promoting the thermally assisted population of green‐emitting levels, which retain 84% of their initial intensity at 523 K. In contrast, the red emission remains unaffected due to the large energy gap between adjacent levels. Consequently, both thermally coupled and non‐thermally coupled thermometric sensitivity are enhanced, with a maximum improvement of up to 6‐fold, leading to a substantial reduction in temperature uncertainty at high temperatures. Furthermore, the practical applicability of flexible polydimethylsiloxane‐based optical fiber and thin‐film temperature sensors is demonstrated. This provides insights into simultaneously optimizing the intensity and sensitivity of luminescent thermometers.
期刊介绍:
Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications.
As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics.
The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.