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Issue 2, 2019
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Optimizing and adjusting the photoluminescence of Mn4+-doped fluoride phosphors via forming composite particles

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Abstract

Nowadays, Mn4+-doped red phosphors are widely used in white LEDs to improve the color rendering index and decrease the correlated color temperature. Great efforts have been made to enhance the luminous efficiency. In this work, new composite particles containing two fluorides with similar structures K2LiAlF6 and K2NaAlF6 were developed to improve the emission intensity. The composite particles contain K2LiAlF6 and K2NaAlF6 phases with an increase of Na content. The particle sizes of the products were in the nanoscale and the element distribution was investigated. Importantly, the as-prepared composite particles had higher emission intensity than simple mixtures. Structural and optical characterization studies were systematically carried out to understand the enhancement mechanism. Finally, a white LED device was fabricated by combining the synthesized red phosphor and YAG:Ce on a blue chip.

Graphical abstract: Optimizing and adjusting the photoluminescence of Mn4+-doped fluoride phosphors via forming composite particles

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Publication details

The article was received on 30 Oct 2018, accepted on 01 Dec 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8DT04335C
Dalton Trans., 2019,48, 711-717

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    Optimizing and adjusting the photoluminescence of Mn4+-doped fluoride phosphors via forming composite particles

    Y. Zhu, S. Yuan, L. Huang, Y. Liu, X. Li, J. Zhong, Y. Chen, D. Chen and J. Wang, Dalton Trans., 2019, 48, 711
    DOI: 10.1039/C8DT04335C

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