Effect of fluxes on luminescence properties of color-tunable Ba1.3Ca0.7SiO4:Eu2+, Mn2+ Phosphor for Near-Ultraviolet White-LEDs. (May 2020)

• Record Type: Journal Article
• Authors: Wang, Haohao; Mao, Feifei; Liu, Yujie; Jiang, Xiping; Ma, Baoliang; Wei, Liangshu; Wu, Fang; Li, Langkai
• Is Part Of: Materials research bulletin. Volume 125(2020)
• Publication Date: 2020-05
• Subjects: Mn2+ ion -- Single-phase -- Fluxing effect -- Color-tunable; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2020.110808
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Single-phase and white-light-emitting Ba1.3Ca0.7SiO4: x Eu2+, y Mn2+ phosphor was synthesized at 1000 °C by adding fluxes. The emission spectra of Ba1.3Ca0.7SiO4: x Eu2+, y Mn2+ phosphor can be tunable by adjusting flux amount and type. The sample with SrCl2 exhibits excellent properties with CRI of 87.2 and CCT of 4905 K. Abstract: Eu 2+ /Mn 2+ -codoped Ba1.3 Ca0.7 SiO4 (BCS), a promising single-phase and white-light-emitting phosphor, is prepared by the solid-state reaction at a calcination temperature of 1000 °C for 2 h by adding SrCl2, CaCl2, KCl, NaCl, NH4 Cl, Li2 CO3, BaF2, CaF2, and BaCl2 as fluxes. The samples are characterized by X-ray diffraction and photoluminescence spectroscopy. The emission wavelength and color-rendering index (CRI) can be tuned by adjusting the amount of the BaCl2 flux and are influenced by the different flux types. NH4 Cl exhibits the best fluxing effect for the Mn 2+ ion doping probably because the formed eutectic mixtures of BaCl2 –CaCl2 during the reaction process promote the reaction. The phosphors produced by adding a SrCl2 flux exhibit the highest CRI of 87.2 with Commision International de I'Eclairage (CIE) chromaticity coordinates of (0.347, 0.343) in the white region under near-ultraviolet light excitation.