Quenching of the red Mn<sup>4+</sup> luminescence in Mn<sup>4+</sup>-doped fluoride LED phosphors

Tim Senden; Relinde J.A. van Dijk-Moes; Andries Meijerink

doi:10.1038/s41377-018-0013-1

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Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors

Original Articles

- Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors
- Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors
- LSA 2018年7卷第4期页码：74-86
- Affiliations：
  
  1.Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
  2.Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
- Author bio：
  
  Tim Senden (t.senden@uu.nl)
- Funds：
- DOI：10.1038/s41377-018-0013-1
  中图分类号：
- 纸质出版日期：2018，
  
  网络出版日期：2018-05-23，
  
  收稿日期：2017-10-12，
  
  修回日期：2018-02-21，
  
  录用日期：2018-03-07
- Accepted：
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Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors[J]. LSA, 2018,7(4):74-86.

Senden, T., van Dijk-Moes, R. J. A. & Meijerink A. Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors. Light: Science & Applications, 7, 74-86 (2018).
Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors[J]. LSA, 2018,7(4):74-86. DOI： 10.1038/s41377-018-0013-1.

Senden, T., van Dijk-Moes, R. J. A. & Meijerink A. Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors. Light: Science & Applications, 7, 74-86 (2018). DOI： 10.1038/s41377-018-0013-1.

摘要

Abstract

Red-emitting Mn

-doped fluorides are a promising class of materials to improve the color rendering and luminous efficacy of white light-emitting diodes (w-LEDs). For w-LEDs

the luminescence quenching temperature is very important

but surprisingly no systematic research has been conducted to understand the mechanism for thermal quenching in Mn

-doped fluorides. Furthermore

concentration quenching of the Mn

luminescence can be an issue but detailed investigations are lacking. In this work

we study thermal quenching and concentration quenching in Mn

-doped fluorides by measuring luminescence spectra and decay curves of K

TiF

:Mn

between 4 and 600 K and for Mn

concentrations from 0.01% to 15.7%. Temperature-dependent measurements on K

TiF

:Mn

and other Mn

-doped phosphors show that quenching occurs through thermally activated crossover between the

excited state and

ground state. The quenching temperature can be optimized by designing host lattices in which Mn

has a high

state energy. Concentration-dependent studies reveal that concentration quenching effects are limited in K

TiF

:Mn

up to 5% Mn

. This is important

as high Mn

concentrations are required for sufficient absorption of blue LED light in the parity-forbidden Mn

–

transitions. At even higher Mn

concentrations (

10%)

the quantum efficiency decreases

mostly due to direct energy transfer to quenching sites (defects and impurity ions). Optimization of the synthesis to reduce quenchers is crucial for developing more efficient highly absor

bing Mn

phosphors. The present systematic study provides detailed insights into temperature and concentration quenching of Mn

emission and can be used to realize superior narrow-band red Mn

phosphors for w-LEDs.

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Keywords

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Quenching of the red Mn4+ luminescence in Mn4+-doped fluoride LED phosphors

Quenching of the red Mn4+ luminescence in Mn4+-doped fluoride LED phosphors

DOI：10.1038/s41377-018-0013-1

摘要

Abstract

关键词

Keywords

references

Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors

Quenching of the red Mn⁴⁺ luminescence in Mn⁴⁺-doped fluoride LED phosphors