HF‐Free Solid‐State Synthesis of the Oxyfluoride Phosphor K3MoOF7:Mn4

K3MoOF7:Mn4+ was synthesized through a facile two‐step solid‐state synthesis route without using HF. The first step was carried out in copper ampules, which were shut by welding, followed by the second step, a ball milling experiment. The sample was characterized by single‐crystal and powder X‐ray d...

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Published in:European journal of inorganic chemistry 2019-08, Vol.2019 (29), p.3383-3388
Main Authors: Stoll, Christiane, Seibald, Markus, Baumann, Dominik, Huppertz, Hubert
Format: Article
Language:English
Subjects:
Luminescence
Manganese
Molybdenum
Solid‐state reactions
Solid‐state structures
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creator Stoll, Christiane
Seibald, Markus
Baumann, Dominik
Huppertz, Hubert
description K3MoOF7:Mn4+ was synthesized through a facile two‐step solid‐state synthesis route without using HF. The first step was carried out in copper ampules, which were shut by welding, followed by the second step, a ball milling experiment. The sample was characterized by single‐crystal and powder X‐ray diffraction, EDX, and luminescence spectroscopy. K3MoOF7 crystallizes in the triclinic space group P1 (no. 2). It features [MoOF5]– units as a main structural motif. At room temperature, seven emission lines are noticeable. The maximum emission line is located at λmax = 627 nm. CIE1931 coordinates could be determined to 0.690(1) and 0.310(1) for x and y, respectively. A luminous efficacy of radiation (LER) of 218 lm Wopt–1 was achieved. Furthermore, temperature dependent luminescence measurements in the range of 25 °C to 100 °C were conducted. K3MoOF7:Mn4+ was synthesized through a facile two‐step, solid‐state synthesis route. K3MoOF7 shows quasi‐isolated [MoOF5]– units as main structural motif. When doped with Mn4+, the substance exhibits a red luminescence on excitation with blue light.
doi_str_mv 10.1002/ejic.201900634
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The first step was carried out in copper ampules, which were shut by welding, followed by the second step, a ball milling experiment. The sample was characterized by single‐crystal and powder X‐ray diffraction, EDX, and luminescence spectroscopy. K3MoOF7 crystallizes in the triclinic space group P1 (no. 2). It features [MoOF5]– units as a main structural motif. At room temperature, seven emission lines are noticeable. The maximum emission line is located at λmax = 627 nm. CIE1931 coordinates could be determined to 0.690(1) and 0.310(1) for x and y, respectively. A luminous efficacy of radiation (LER) of 218 lm Wopt–1 was achieved. Furthermore, temperature dependent luminescence measurements in the range of 25 °C to 100 °C were conducted. K3MoOF7:Mn4+ was synthesized through a facile two‐step, solid‐state synthesis route. K3MoOF7 shows quasi‐isolated [MoOF5]– units as main structural motif. 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subjects Luminescence
Manganese
Molybdenum
Solid‐state reactions
Solid‐state structures
title HF‐Free Solid‐State Synthesis of the Oxyfluoride Phosphor K3MoOF7:Mn4
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