Photoluminescence properties of NUV light excited Ba(Mg1/3Nb2/3)O3:Eu3+ red phosphor with high color purity. Issue 9 (15th June 2019)

• Record Type: Journal Article
• Authors: Shen, Jie; Wang, Zixing; Zhou, Jing; Liu, Xuan; Chen, Wen
• Is Part Of: Ceramics international. Volume 45:Issue 9(2019)
• Page Start: 11844
• Page End: 11849
• Publication Date: 2019-06-15
• Subjects: Photoluminescence -- Perovskite oxide -- Red phosphor -- Sol-gel process; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.03.065
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, a new red phosphor with high color purity, Eu 3+ ions doped Ba(Mg1/3 Nb2/3 )O3 phosphor has been prepared by wet chemical method. The structure analysis suggests BMN: x %Eu phosphors have a hexagonal phase and Ba 2+ ions are replaced by Eu 3+ ions in BMN. Upon excitation of NUV light, the BMN: x %Eu phosphors emit strong red light around 615 nm, derived from the 5 D0 - 7 F2 transition of Eu 3+ ions. The relationship between luminescent properties and structure of BMN: x %Eu was discussed. The Judd-Ofelt intensity parameters (Ω2, Ω4 ) were calculated to analyze the asymmetry of the Eu 3+ ions site occupancy further, and the quantum efficiency of BMN:3%Eu was found to be 77.26%. In addition, the decay curve indicates the decay time( τ ) of BMN:3%Eu is determined to be 1.34 ms and Eu 3+ ions occupy only one type of site. The CIE chromaticity coordinate (0.656, 0.344) of BMN:3%Eu is quite close to the red phosphors standard value (0.670, 0.330), which indicates BMN: x %Eu can be a suitable red phosphor used in NUV-based white LEDs.