A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices. Issue 13 (16th February 2015)

• Record Type: Journal Article
• Authors: Zhou, Qiang; Zhou, Yayun; Liu, Yong; Luo, Lijun; Wang, Zhengliang; Peng, Jinhui; Yan, Jing; Wu, Mingmei
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 13(2015)
• Page Start: 3055
• Page End: 3059
• Publication Date: 2015-02-16
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4tc02956a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A new red phosphor BaGeF6 :Mn 4+ prepared by a hydrothermal route shows intense red emission under blue light excitation, which may find application in warm white LED devices. Abstract : In this work, we report a new and efficient red phosphor BaGeF6 :Mn 4+ (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.