Simultaneous Tailoring of Robust Anti‐Thermal Quenching and High Thermometric Sensitivity in Lanthanide‐Doped Cs2NaYF6 Double Perovskites

IF 9.8 1区 物理与天体物理 Q1 OPTICS
Kejie Li, Mochen Jia, Jiaqi Zhao, Gaixin Zhang, Dongxu Guo, Zhiying Wang, Zuoling Fu
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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.
镧系掺杂Cs2NaYF6双钙钛矿的抗热猝灭和高热灵敏度同时裁剪
镧系掺杂的双钙钛矿由于其明显的热猝灭光致发光而成为远程光学测温的有希望的候选者。然而,在高温下大量的发射衰减对实现高测量精度提出了挑战。本文报道了一种易于固态合成的高效镧系掺杂氟化物双钙钛矿Cs2NaYF6,它具有强大的抗热猝灭行为,同时通过用Li+部分取代Na+保持增强的热敏性。Li+掺杂引起晶格收缩和刚度增加,降低声子能量,抑制电子-声子耦合,从而增强发射强度,减轻Er3+的热猝灭。同时,Li+诱导的Er3+周围局部对称畸变导致2H11/2进一步Stark分裂,促进了绿色发光能级的热辅助居群,其在523 K时保持了84%的初始强度。相比之下,由于相邻能级之间的能量差距很大,红色发射不受影响。因此,热耦合和非热耦合的测温灵敏度都得到了提高,最高可提高6倍,从而大大降低了高温下的温度不确定性。此外,还证明了柔性聚二甲基硅氧烷基光纤和薄膜温度传感器的实际适用性。这为同时优化发光温度计的强度和灵敏度提供了见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
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.
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