Luminescence Enhancement of Mn4+-Activated Fluorides via a Heterovalent Co-Doping Strategy for Monochromatic Multiplexing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuanjing Wang
  • Yayun Zhou
  • Hong Ming
  • Yifei Zhao
  • Enhai Song
  • And 1 others
  • Qinyuan Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)51255-51265
Journal / PublicationACS Applied Materials & Interfaces
Volume13
Issue number43
Online published26 Oct 2021
Publication statusPublished - 3 Nov 2021

Abstract

Mn4+ non-equivalent doped fluorides with high color purity red emission and relatively short decay time are crucial for wide color gamut displays and emerging applications, whereas the low quantum efficiency (QE) restrains their further applications. Herein, the luminescence of Mn4+ non-equivalent doped fluoride K2NaAlF6:Mn4+ (KNAF:Mn4+) is significantly enhanced via a heterovalent co-doping strategy, where the luminescence intensity is obviously increased by ∼85%, but the decay time is almost unchanged. The experimental characterization and density functional theory (DFT) calculations provide an understanding of the luminescence enhancement mechanism of heterovalent co-doping, which is enabled by simultaneously improving the stability of Mn4+ and reducing the number of quenching centers (defects and impurities). Combining the short-decay-time (τ = 4.03 ms) emission KNAF:Mn4+, Mg2+ and long-decay-time (τ = 9.23 ms) emission K2SiF6:Mn4+, a novel monochromatic multiplexing mode in the millisecond order is presented, which can be decoded not only in high-efficiency by a digital camera but also with a high security. This work provides a new optical multiplexing for the information security applications and also inspires the design of high-efficiency Mn4+-activated luminescent materials.

Research Area(s)

  • red emission, Mn4+, non-equivalent doping, luminescence enhancement multiplexing, information security, PHOSPHORS SYNTHESIS, HIGHLY EFFICIENT, RED, CRYSTAL

Citation Format(s)

Luminescence Enhancement of Mn4+-Activated Fluorides via a Heterovalent Co-Doping Strategy for Monochromatic Multiplexing. / Wang, Yuanjing; Zhou, Yayun; Ming, Hong; Zhao, Yifei; Song, Enhai; Zhang, Qinyuan.

In: ACS Applied Materials & Interfaces, Vol. 13, No. 43, 03.11.2021, p. 51255-51265.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review