Bulletin of the Korean Chemical Society | |
Synthesis of Microwave Sol–Gel Derived NaCaLa(WO4)3:Ho3+/Yb3+ Phosphors and Their Spectroscopic Properties | |
Chang Sung Lim1  | |
[1] Department of Advanced Materials Science and Engineering Hanseo University Seosan 356‐706 Korea. | |
关键词: ; NaCaLa1 ; ; −; x ; (WO4 ; )3:Ho3+/Yb3+ ; Microwave sol–; gel; Upconversion luminescence; Raman spectroscopy; | |
DOI : 10.1002/bkcs.10883 | |
学科分类:化学(综合) | |
来源: Korean Chemical Society | |
【 摘 要 】
Ho3+/Yb3+ coâdoped NaCaLa1âx(WO4)3 ternary tungstates with the proper concentrations of doping for Ho3+ and Yb3+ (xâ=âHo3+ + Yb3+, Ho3+â=â0, 0.05, 0.1, and 0.2, and Yb3+â=â0, 0.2, and 0.45) were precisely synthesized using the solâgel method assisted by the microwave technique; their upconverted spectroscopic properties were studied in detail. The particles provided wellâcrystallized morphology with a homogeneous and fine morphology, showing the grain sizes of 2â5âµm. After the low excitation at 980ânm, the NaCaLa0.7(WO4)3Ho0.1/Yb0.2 and NaCaLa0.5(WO4)3Ho0.05/Yb0.45 ternary tungstates provided strong upconverted yellow emissions, which are based on a strong green emission band of 545ânm and a strong red emission band of 655ânm. The optimal Yb3+Ho3+ ratio was obtained to be 91, as indicated by the compositionâdependent quenching effect of Ho3+ ions. The Raman spectra for the doped ternary tungstates showed the presence of strong peaks at higher frequencies, which were superimposed by strong Ho3+ luminescence lines. The dependence of pump power and Commission Internationale de L'Eclairage (CIE) chromaticity of the upconverted emission intensity was investigated in detail.
【 授权许可】
Unknown
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