Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors

Wang, Yunfeng; Zhu, Qijian; Li, Junhao; Milićević, Bojana R.; Zhou, Rongfu; Liu, Shuanglai; Zhang, Qiuhong; Huo, Jiansheng; Zhou, Jianbang

doi:10.1016/j.ceramint.2023.05.244

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2023

Authors

Wang, Yunfeng
Zhu, Qijian
Li, Junhao

Milićević, Bojana R.

Zhou, Rongfu
Liu, Shuanglai
Zhang, Qiuhong
Huo, Jiansheng
Zhou, Jianbang

Article (Published version)

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Abstract

Mn4+-activated fluoride is one of the most important red phosphors for white light-emitting diodes (WLEDs) with high color rendering index (CRI). Due to a lack of water resistance, their potential applications are limited. Although surface coating strategies improve the waterproof stability of ﬂuoride red phosphors, they have downsides. It was found that Nb5+ plays an important role in improving the water resistance of Mn4+-activated oxyfluorides by preventing the hydrolysis of [MnF6]2-. In this work, the influence of Nb5+ on the waterproof stability of Mn4+-activated fluorides was explored. A set of synthesized K2Ta1-xNbxF7:Mn4+ phosphors exhibit tunable and superior water resistance. The photoluminescence (PL) intensity of the representative sample K2Ta0.6Nb0.4F7:5%Mn4+ remains nearly 100% of its initial value even after being immersed in water for 60 min, which is significantly higher than the commercial K2SiF6:Mn4+ red phosphor (8.7%). Our findings open up new possibilities for the...

Source:
Ceramics International, 2023, 49, 16, 27024-27029

Funding / projects:

National Nature Science Foundation of China [No. 52272143, 52102194]
Science and Technology Project of Guangzhou City [No. 2023A04J0299]
Major Science and Technology Project of Jiangxi Province-The Open Competition Mechanism to Select the Best Candidates [No. 20223AAE01003]
Guangdong Basic and Applied Basic Research Foundation [No. 2021A1515010449, 2021A1515110404, 2021A1515111159]
Major Science and Technology Project of Zhongshan City [No. 2022A1007]
GDAS’ Project of Science and Technology Development [No. 2022GDASZH-2022010104, 2023GDASZH-2023010104]
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) (RS-200017)

DOI: 10.1016/j.ceramint.2023.05.244

ISSN: 0272-8842

WoS: 001030022800001

TY - JOUR
AU - Wang, Yunfeng
AU - Zhu, Qijian
AU - Li, Junhao
AU - Milićević, Bojana R.
AU - Zhou, Rongfu
AU - Liu, Shuanglai
AU - Zhang, Qiuhong
AU - Huo, Jiansheng
AU - Zhou, Jianbang
PY - 2023
UR - https://vinar.vin.bg.ac.rs/handle/123456789/11079
AB - Mn4+-activated fluoride is one of the most important red phosphors for white light-emitting diodes (WLEDs) with high color rendering index (CRI). Due to a lack of water resistance, their potential applications are limited. Although surface coating strategies improve the waterproof stability of ﬂuoride red phosphors, they have downsides. It was found that Nb5+ plays an important role in improving the water resistance of Mn4+-activated oxyfluorides by preventing the hydrolysis of [MnF6]2-. In this work, the influence of Nb5+ on the waterproof stability of Mn4+-activated fluorides was explored. A set of synthesized K2Ta1-xNbxF7:Mn4+ phosphors exhibit tunable and superior water resistance. The photoluminescence (PL) intensity of the representative sample K2Ta0.6Nb0.4F7:5%Mn4+ remains nearly 100% of its initial value even after being immersed in water for 60 min, which is significantly higher than the commercial K2SiF6:Mn4+ red phosphor (8.7%). Our findings open up new possibilities for the development of waterproof fluoride red phosphors. © 2023 Elsevier Ltd and Techna Group S.r.l.
T2 - Ceramics International
T1 - Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors
VL - 49
IS - 16
SP - 27024
EP - 27029
DO - 10.1016/j.ceramint.2023.05.244
ER -

@article{
author = "Wang, Yunfeng and Zhu, Qijian and Li, Junhao and Milićević, Bojana R. and Zhou, Rongfu and Liu, Shuanglai and Zhang, Qiuhong and Huo, Jiansheng and Zhou, Jianbang",
year = "2023",
abstract = "Mn4+-activated fluoride is one of the most important red phosphors for white light-emitting diodes (WLEDs) with high color rendering index (CRI). Due to a lack of water resistance, their potential applications are limited. Although surface coating strategies improve the waterproof stability of ﬂuoride red phosphors, they have downsides. It was found that Nb5+ plays an important role in improving the water resistance of Mn4+-activated oxyfluorides by preventing the hydrolysis of [MnF6]2-. In this work, the influence of Nb5+ on the waterproof stability of Mn4+-activated fluorides was explored. A set of synthesized K2Ta1-xNbxF7:Mn4+ phosphors exhibit tunable and superior water resistance. The photoluminescence (PL) intensity of the representative sample K2Ta0.6Nb0.4F7:5%Mn4+ remains nearly 100% of its initial value even after being immersed in water for 60 min, which is significantly higher than the commercial K2SiF6:Mn4+ red phosphor (8.7%). Our findings open up new possibilities for the development of waterproof fluoride red phosphors. © 2023 Elsevier Ltd and Techna Group S.r.l.",
journal = "Ceramics International",
title = "Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors",
volume = "49",
number = "16",
pages = "27024-27029",
doi = "10.1016/j.ceramint.2023.05.244"
}

Wang, Y., Zhu, Q., Li, J., Milićević, B. R., Zhou, R., Liu, S., Zhang, Q., Huo, J.,& Zhou, J.. (2023). Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors. in Ceramics International, 49(16), 27024-27029.
https://doi.org/10.1016/j.ceramint.2023.05.244

Wang Y, Zhu Q, Li J, Milićević BR, Zhou R, Liu S, Zhang Q, Huo J, Zhou J. Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors. in Ceramics International. 2023;49(16):27024-27029.
doi:10.1016/j.ceramint.2023.05.244 .

Wang, Yunfeng, Zhu, Qijian, Li, Junhao, Milićević, Bojana R., Zhou, Rongfu, Liu, Shuanglai, Zhang, Qiuhong, Huo, Jiansheng, Zhou, Jianbang, "Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors" in Ceramics International, 49, no. 16 (2023):27024-27029,
https://doi.org/10.1016/j.ceramint.2023.05.244 . .