Stoll Christiane, Bandemehr Jascha, Kraus Florian, Seibald Markus, Baumann Dominik, Schmidberger Michael J, Huppertz Hubert
Institut für Allgemeine, Anorganische und Theoretische Chemie , Universität Innsbruck , Innrain 80-82 , 6020 Innsbruck , Austria.
Anorganische Chemie, Fluorchemie, Fachbereich Chemie , Philipps-Universität Marburg , Hans-Meerwein-Straße 4 , 35032 Marburg , Germany.
Inorg Chem. 2019 May 6;58(9):5518-5523. doi: 10.1021/acs.inorgchem.8b03433. Epub 2019 Mar 21.
LiSiF:Mn was synthesized via a new HF-free synthesis route by a high-pressure/high-temperature doping experiment at 5.5 GPa and 750 °C. It is proven that the phosphor cannot be synthesized by the common wet-chemical precipitation route in aqueous HF. The sample was characterized by powder X-ray diffraction, EDX, and luminescence spectroscopy. At room temperature, LiSiF:Mn exhibits seven emission lines with the strongest line at λ ≈ 630 nm and a dominant wavelength of λ ≈ 618 nm. The CIE coordinates are 0.688 and 0.312 for x and y, respectively. The compound shows a luminous efficacy of radiation (LER) of 218 lm W, which exceeds the LER of current state-of-the-art red LED phosphor KSiF:Mn by 7% due to a blue-shift of the emission. It reveals excellent thermal quenching behavior up to 125 °C.
通过在5.5 GPa和750°C下进行高压/高温掺杂实验，采用一种新的无氢氟酸合成路线合成了LiSiF:Mn。事实证明，该荧光粉不能通过在氢氟酸水溶液中常见的湿化学沉淀路线合成。通过粉末X射线衍射、能谱仪和发光光谱对样品进行了表征。在室温下，LiSiF:Mn呈现出七条发射线，最强的发射线位于λ≈630 nm处，主峰波长为λ≈618 nm。CIE坐标x为0.688，y为0.312。该化合物的辐射发光效率（LER）为218 lm/W，由于发射的蓝移，比当前最先进的红色LED荧光粉KSiF:Mn的LER高出7%。它在高达125°C的温度下表现出优异的热猝灭性能。
