Department of Microsystems, Faculty of Technology, Natural Sciences and Maritime Sciences, Campus Vestfold, University of South-Eastern Norway, 3184 Borre, Norway.
Molecules. 2023 Jan 19;28(3):1014. doi: 10.3390/molecules28031014.
In this study, we developed a technology for broadening the 465 nm and 535 nm excitation peaks of Eu:Y(MoO) via crystal lattice orderly arrangement. This was achieved by powder particle aggregation and diffusion at a high temperature to form a ceramic structure. The powdered Eu:Y(MoO) was synthesized using the combination of a sol-gel process and the high-temperature solid-state reaction method, and it then became ceramic via a sintering process. Compared with the Eu:Y(MoO) powder, the full width at half maximum (FWHM) of the excitation peak of the ceramic was broadened by two- to three-fold. In addition, the absorption efficiency of the ceramic was increased from 15% to 70%, while the internal quantum efficiency reduced slightly from 95% to 90%, and the external quantum efficiency was enhanced from 20% to 61%. More interestingly, the Eu:Y(MoO) ceramic material showed little thermal quenching below a temperature of 473 K, making it useful for high-lumen output operating at a high temperature.
在这项研究中，我们开发了一种通过有序排列晶体格子来拓宽 Eu:Y(MoO) 的 465nm 和 535nm 激发峰的技术。这是通过在高温下的粉末颗粒聚集和扩散来实现的，从而形成陶瓷结构。Eu:Y(MoO) 粉末是通过溶胶-凝胶工艺和高温固态反应方法结合合成的，然后通过烧结工艺成为陶瓷。与 Eu:Y(MoO) 粉末相比，陶瓷的激发峰的半峰全宽（FWHM）拓宽了两到三倍。此外，陶瓷的吸收效率从 15%增加到 70%，而内部量子效率从 95%略微降低到 90%，外部量子效率从 20%提高到 61%。更有趣的是，Eu:Y(MoO) 陶瓷材料在 473K 以下表现出很小的热猝灭，因此可用于在高温下高流明输出的工作。
