Increasing the Power: Absorption Bleach, Thermal Quenching, and Auger Quenching of the Red-Emitting Phosphor K2TiF6:Mn4+

Jur W. de Wit; Thomas P. van Swieten; Marie Anne van de Haar; Andries Meijerink; Freddy T. Rabouw

doi:10.1002/adom.202202974

Increasing the Power: Absorption Bleach, Thermal Quenching, and Auger Quenching of the Red-Emitting Phosphor K₂TiF₆:Mn⁴⁺

Jur W. de Wit, Thomas P. van Swieten, Marie Anne van de Haar, Andries Meijerink, Freddy T. Rabouw^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Mn⁴⁺-doped fluorides are popular phosphors for warm-white lighting, converting blue light from light-emitting diodes (LEDs) into red light. However, they suffer from droop, that is, decreasing performance at increasing power, limiting their applicability for high-power applications. Previous studies highlight different causes of droop. Here, a unified picture of droop of Mn⁴⁺-doped K₂TiF₆, accounting for all previously proposed mechanisms, is provided. Combining continuous-wave and pulsed experiments on samples of different Mn⁴⁺ content with kinetic Monte Carlo modeling, the contributions of absorption bleach, thermal quenching, and Auger quenching at different excitation densities, are quantified. This work contributes to understanding the fundamental limitations of these materials and may inspire strategies to make Mn⁴⁺-doped fluorides more efficient in high-power applications.

Original language	English
Article number	2202974
Pages (from-to)	1-7
Journal	Advanced Optical Materials
Volume	11
Issue number	9
DOIs	https://doi.org/10.1002/adom.202202974
Publication status	Published - 4 May 2023

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.

Funding

J.W.d.W. and A.M. acknowledge financial support from the project CHEMIE.PGT.2019.004 of TKI/Topsector Chemie, which is partly financed by the Netherlands Organisation for Scientific Research (NWO). F.T.R. acknowledges financial support from the NWO (VIDI grant, VI.Vidi.203.031).

Funders	Funder number
Netherlands Organisation for Scientific Research (NWO)	CHEMIE.PGT.2019.004, VI.Vidi.203.031

Keywords

absorption bleach
Auger quenching
droop
red phosphor
thermal quenching

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Advanced Optical Materials - 2023 - Wit - Increasing the Power Absorption Bleach Thermal Quenching and Auger QuenchingFinal published version, 1.43 MBLicence: CC BY

Cite this

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title = "Increasing the Power: Absorption Bleach, Thermal Quenching, and Auger Quenching of the Red-Emitting Phosphor K2TiF6:Mn4+",

abstract = "Mn4+-doped fluorides are popular phosphors for warm-white lighting, converting blue light from light-emitting diodes (LEDs) into red light. However, they suffer from droop, that is, decreasing performance at increasing power, limiting their applicability for high-power applications. Previous studies highlight different causes of droop. Here, a unified picture of droop of Mn4+-doped K2TiF6, accounting for all previously proposed mechanisms, is provided. Combining continuous-wave and pulsed experiments on samples of different Mn4+ content with kinetic Monte Carlo modeling, the contributions of absorption bleach, thermal quenching, and Auger quenching at different excitation densities, are quantified. This work contributes to understanding the fundamental limitations of these materials and may inspire strategies to make Mn4+-doped fluorides more efficient in high-power applications.",

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AU - Meijerink, Andries

AU - Rabouw, Freddy T.

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