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Optical temperature sensing and luminescent switching properties in Pr/Er‐doped (K 0.5 Na 0.5 )NbO 3 materials
Author(s) -
Zhu Yan,
Li Xuefeng,
Guo Zizhong,
Sun Haiqin,
Zhang Qiwei,
Hao Xihong
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17010
Subject(s) - luminescence , materials science , doping , photon upconversion , fluorescence , optoelectronics , excitation , photochromism , temperature measurement , analytical chemistry (journal) , natural bond orbital , optics , nanotechnology , chemistry , physics , density functional theory , computational chemistry , chromatography , quantum mechanics
For optical temperature sensing materials, the emission and excitation bands are extremely critical to measure the temperature by fluorescence intensity ratio (FIR) technique. Singly Ln‐doped optical temperature sensing materials exhibit very few emission bands, which greatly constraints their practical applications of FIR technique. Here, the fabricated Pr/Er co‐doped (K 0.5 Na 0.5 )NbO 3 materials exhibited multi‐color (red‐green) and dual‐mode (downshifting/upconversion) luminescence properties. The temperature sensitivity can be effectively tuned by choosing different emission or excitation bands. The optimized optical temperature sensitivity reached up to 0.0094 K −1 , much higher than that of most temperature sensing materials. Besides, the samples also showed excellent luminescence modulation properties based on the photochromic reaction. Under sunlight irradiation, the luminescent switching contrast (Δ R t ) of the samples reached more than 60%. These results may provide a guiding role in designing and modulating optical temperature sensing properties for multifunctional materials.