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Issue 29, 2017
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Novel red-emitting phosphors A2HfF6:Mn4+ (A = Rb+, Cs+) for solid-state lighting

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Abstract

New red-emitting phosphors A2HfF6:Mn4+ (A = Rb+, Cs+) with a single phase have been successfully synthesized via a simple ion exchange method, and their structures and luminescence properties were investigated. It was found that Mn4+ ions in Rb2HfF6 and Cs2HfF6 who share wide band gaps can possess broad excitation bands in the blue regions and intense red emission with internal quantum yields of 0.556 and 0.652, respectively. Meanwhile, these red phosphors exhibit high chemical and thermal stabilities. A series of LED devices with a tunable color rendering index and color temperature were fabricated with these samples which can remarkably optimize the optical performances of white light-emitting diodes (w-LEDs). These results indicate that A2HfF6:Mn4+ phosphors can be promising red phosphors in w-LEDs.

Graphical abstract: Novel red-emitting phosphors A2HfF6:Mn4+ (A = Rb+, Cs+) for solid-state lighting

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Publication details

The article was received on 20 May 2017, accepted on 26 Jun 2017 and first published on 27 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01842H
Citation: Dalton Trans., 2017,46, 9451-9456
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    Novel red-emitting phosphors A2HfF6:Mn4+ (A = Rb+, Cs+) for solid-state lighting

    Z. Yang, Q. Wei, M. Rong, Z. Yang, Z. Wang, Q. Zhou and Q. Wang, Dalton Trans., 2017, 46, 9451
    DOI: 10.1039/C7DT01842H

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