Luminescence properties and energy transfer of K3LuF6:Tb3+, Eu3+ multicolor phosphors with a cryolite structure. Issue 8 (1st February 2019)

• Record Type: Journal Article
• Authors: Yang, Dan; Liao, Libing; Guo, Qingfeng; Mei, Lefu; Liu, Haikun; Zhou, Tianshuai; Ye, Huan
• Is Part Of: RSC advances. Volume 9:Issue 8(2019)
• Page Start: 4295
• Page End: 4302
• Publication Date: 2019-02-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra10059d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Single-phase multicolor phosphors with a cryolite structure were obtained via energy transfer from Tb 3+ to Eu 3+ . Abstract : In recent years, compounds with a cryolite structure have become excellent hosts for luminescent materials. In this paper, Tb 3+ doped and Tb 3+ /Eu 3+ co-doped K3 LuF6 phosphors were prepared via a high temperature solid phase sintering method. The XRD, SEM, as well as photoluminescence excitation (PLE) and emission (PL) spectra were measured to investigate the structure and luminescence properties of the as-prepared samples. In the Tb 3+ /Eu 3+ co-doped K3 LuF6 samples, both characteristic emission spectra of Tb 3+ and Eu 3+ could be observed and the emission color of the K3 LuF6 :0.12Tb 3+, x Eu 3+ phosphors could be adjusted from green to yellowish pink and the corresponding CIE values could be regulated from (0.2781, 0.5407) in the green area to (0.4331, 0.3556) in the yellowish pink area by controlling the concentration ratio of Eu 3+ /Tb 3+ . In addition, the energy transfer mechanism in Tb 3+ /Eu 3+ co-doped K3 LuF6 was calculated to be a quadrupole–quadrupole interaction from Tb 3+ to Eu 3+ based on the Dexter's equation.