Structure and luminescence properties of La6Ba4(SiO4)6F2:Dy3+ phosphor with apatite structure. Issue 68 (19th November 2018)

• Record Type: Journal Article
• Authors: Zhang, Jialei; Guo, Qingfeng; Liao, Libing; Wang, Yongjie; He, Mingyue; Ye, Huan; Mei, Lefu; Liu, Haikun; Zhou, Tianshuai; Ma, Bin
• Is Part Of: RSC advances. Volume 8:Issue 68(2018)
• Page Start: 38883
• Page End: 38890
• Publication Date: 2018-11-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra08324j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Single-phase white light emitting La6 Ba4 (SiO4 )6 F2 :Dy 3+ phosphors with good thermal stability were obtained. Abstract : In this study, we investigated the structure, luminescence properties and morphology of La6 Ba4 (SiO4 )6 F2 :Dy 3+ in detail using X-ray diffraction (XRD), photoluminescence spectroscopy, scanning electron microscopy (SEM) and decay kinetics measurements. The results indicate that La6 Ba4 (SiO4 )6 F2 :Dy 3+ was well crystallized, and its structure is of apatite-type and belongs to the hexagonal system. The prepared samples exhibit two intense characteristic bands in the blue (484 nm) and yellow (579 nm) spectral ranges corresponding to the Dy 3+ transitions 4 F9/2 → 6 H15/2 and 4 F9/2 → 6 H13/2, respectively. These dominant photoluminescence bands are accompanied by a weak red band (670 nm) due to the 4 F9/2 → 6 H11/2 transition. The emission color of La6 Ba4 (SiO4 )6 F2 :Dy 3+ phosphors are found to fall in the white light region. The Dy 3+ optimal dopant concentration in the La6 Ba4 (SiO4 )6 F2 host was found to be 0.12 (mol). In addition, the phosphors have high thermal stability. Hence, La6 Ba4 (SiO4 )6 F2 :Dy 3+ may have an application in white light-emitting diodes.