Development of a cyan blue-emitting Ba3La2(BO3)4:Ce3+, Tb3+ phosphor for use in dental glazing materials: color tunable emission and energy transfer. Issue 40 (16th July 2021)

• Record Type: Journal Article
• Authors: Jeong, Gyu Jin; Kang, Tae Wook; Park, Young Ji; Park, Ye Jin; Lee, Younki; Bae, Byungseo; Kim, Sun Woog
• Is Part Of: RSC advances. Volume 11:Issue 40(2021)
• Page Start: 24949
• Page End: 24957
• Publication Date: 2021-07-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra04384f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Herein, we demonstrated the possibility of using Ba3 La2 (BO3 )4 :Ce 3+, Tb 3+ phosphors in dental glazing paste. Abstract : The Ce 3+ /Tb 3+ doped Ba3 La2 (BO3 )4 phosphors were synthesized by a conventional solid state reaction method. The synthesized phosphor samples are a single phase of Ba3 La2 (BO3 )4 and showed angular-shaped fine grains with average particle size from 5 μm to 10 μm. The Ba3 La2 (BO3 )4 :Ce 3+ phosphors showed an asymmetric broad blue emission under excitation at 365 nm and the Ba3 La2 (BO3 )4 :Tb 3+ phosphors exhibited typical green emission assigned to the 4f–4f transition of Tb 3+ under excitation at 254 nm. Under near-UV (365 nm) excitation, Ba3 La2 (BO3 )4 :Ce 3+, Tb 3+ phosphors showed both a blue emission band and green emission peaks due to Ce 3+ and Tb 3+, respectively. By optimizing the composition, cyan-blue emission with high color purity (CIE chromaticity coordinate values x = 0.2557 and y = 0.3839) was obtained for the Ba3 La2 (BO3 )4 :0.05Ce 3+, 0.03Tb 3+ phosphor, and the internal quantum efficiency of the phosphor at the excitation wavelength of 365 nm is estimated to be 50%. The dental glazing paste prepared by mixing organic binder, Ba3 La2 (BO3 )4 :Ce 3+, Tb 3+ phosphors, and low T g glass was successfully vitrified when it was heated at 600 and 700 °C, and showed high chemical stability of the luminescence properties in acidic aqueous solution (pH = 4).