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Synthesis and improved photoluminescence of a novel red phosphor LiSrGaF6:Mn4+ for application in warm WLEDs

Abstract

Red phosphors composed of Mn4+ -activated complex fluorides have attracted considerable attentions because of the application in warm white light emitting diodes (WLEDs). The present work reports a facile strategy to synthesize a novel red phosphor LiSrGaF6:Mn4+ (LSGF:Mn) at room temperature and its formation mechanism has been discussed. The Mn4+ ions occupy Ga3+ sites located at the centers of the distorted GaF6 octahedrons and emit intense red luminescence when excited by UV or blue light. The influence of synthesis conditions, such as the type of strontium salts, the concentration of K2MnF6 and NH3·H2O, and the reaction temperature. The luminescence intensity of the phosphor LSGF:Mn has been improved by optimizing the synthetic parameters. The as-prepared phosphor LSGF:Mn has a broad and intense absorption in the blue region and a bright luminescence in red region, which indicates that is promising in applications in warm WLEDs.

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Publication details

The article was received on 10 Jul 2018, accepted on 07 Aug 2018 and first published on 08 Aug 2018


Article type: Paper
DOI: 10.1039/C8DT02818D
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Synthesis and improved photoluminescence of a novel red phosphor LiSrGaF6:Mn4+ for application in warm WLEDs

    M. Zhu, Y. Pan, M. Wu, H. Lian and J. Lin, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT02818D

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