A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Qiang Zhou; Yayun Zhou; Yong Liu; Lijun Luo; Zhengliang Wang; Jinhui Peng; Jing Yan; Mingmei Wu

doi:10.1039/C4TC02956A

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A new red phosphor BaGeF₆:Mn⁴⁺: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices†

Qiang Zhou,^a Yayun Zhou,^a Yong Liu,^a Lijun Luo,^a Zhengliang Wang,*^a Jinhui Peng,^a Jing Yan^b and Mingmei Wu*^b

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* Corresponding authors

^a Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, School of Chemistry and Biotechnology, Yunnan Minzu University, Kunming, P. R. China
E-mail: wangzhengliang@foxmail.com

^b MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, P. R. China
E-mail: ceswmm@mail.sysu.edu.cn

Abstract

In this work, we report a new and efficient red phosphor BaGeF₆:Mn⁴⁺ (denoted as BGFM) by hydrothermally etching BaCO₃ and GeO₂ in HF solution with an optimized KMnO₄ concentration. The crystal structure and morphology were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) in detail. The influence of synthesis conditions on its photo-luminescent (PL) properties has been investigated comprehensively. It can present broad adsorption and sharp emissions in blue and red ranges respectively. The white LED device made of a blue GaN chip merged with a YAG:Ce–BGFM mixture presents warmer white light than that merged with only one YAG:Ce component.

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Article information

DOI: https://doi.org/10.1039/C4TC02956A
Article type: Paper
Submitted: 25 Dec 2014
Accepted: 30 Jan 2015
First published: 03 Feb 2015

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J. Mater. Chem. C, 2015,3, 3055-3059

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A new red phosphor BaGeF₆:Mn⁴⁺: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Q. Zhou, Y. Zhou, Y. Liu, L. Luo, Z. Wang, J. Peng, J. Yan and M. Wu, J. Mater. Chem. C, 2015, 3, 3055 DOI: 10.1039/C4TC02956A

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Journal of Materials Chemistry C