Thermometry and up-conversion luminescence of Yb3+–Er3+ co-doped Na2Ln2Ti3O10 (Ln = Gd, La) phosphors

文献情報

出版日 2016-06-20

DOI 10.1039/C6CP02746F

インパクトファクター 3.676

著者

Zhiyu Zhang, Chongfeng Guo, Hao Suo, Xiaoqi Zhao, Niumiao Zhang, Ting Li

原文を見る

要旨

Yb3+/Er3+-ion co-doped Na2Ln2Ti3O10 (Ln = Gd, La) up-conversion (UC) phosphors were successfully synthesized by a sol–gel method, and their crystal structures were characterized by powder X-ray diffraction. Dazzling yellow-greenish light was emitted under the excitation of 980 nm near-infrared (NIR) light, composing green and red emission bands from the 2H11/2/4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions of Er3+, respectively. The optimal composition and synthesis parameters were determined according to their UC emission intensity. The photon absorption and emission processes were illustrated based on the UC mechanism, in which energy transfer (ET) from Yb3+ to Er3+ plays a pivotal role and has been proved by the variation of green emission lifetime in Er3+ singly and Yb3+/Er3+ co-doped Na2Ln2Ti3O10 samples. The temperature-dependent fluorescence intensity ratios (FIR) of the two thermal coupled energy level (TCL) emission from 2H11/2 → 4I15/2 (526 nm) and 4S3/2 → 4I15/2 (549 nm) were calculated in the range of 290–490 K, and their sensitivity values were approximately 0.0058 K−1 for Na2Gd2Ti3O10 at 490 K and 0.0061 K−1 for Na2La2Ti3O10 at 470 K, as potential optical temperature sensor.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.