Anti-Defect engineering toward high luminescent efficiency in whitlockite phosphors
نویسندگان
چکیده
Lacking an effective strategy to simultaneously address the challenges of quantum efficiency, luminescence intensity and thermal stability has become key bottleneck for further development large-scale application solid-state lighting technology. Herein, inspired by defect-engineering used in photoelectrocatalytic photovoltaic materials, we acted a diametrically opposite way unprecedentedly proposed anti-defect engineering develop high-efficiency phosphors. By constructing rigid structure introducing alkali metals M remove cation vacancy defects, similar building blocks jigsaw puzzle, developed three groups whitlockite phosphors, namely Ca3-xSrx(PO4)2:Ce3+, Ca3(PO4)2:Ce3+,M (Ca0.5Sr0.5)3(PO4)2:Ce3+,Na+,Mn2+, synchronously realized significant enhancement photoluminescence (2.46 times), (87.92% at 150 °C), cathodoluminescence (3.34 yield (from 38.90% 99.07%). We characterized defect concentration positron annihilation technique (PAT), calculated Debye temperature (?D) simulated occupation according DFT theory reveal improvement mechanism. Some advanced applications were also explored this work, including warm-white LEDs, plant growth information security. The work may contribute phosphors next-generation smart technologies.
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ژورنال
عنوان ژورنال: Chemical Engineering Journal
سال: 2022
ISSN: ['1873-3212', '1385-8947']
DOI: https://doi.org/10.1016/j.cej.2022.134652