Influence of amorphous and crystalline type precursor intermediates on the morphology and luminescence properties of green emitting β-Ca2SiO4:Eu2+ phosphor synthesized using a liquid phase precursor method

• Published in: Journal of alloys and compounds 2014-09, Vol.608, p.311-317
• Main Authors: Jo, Deok Su, Kim, Jihae, Senthil, Karupannan, Lee, Hoo-Jeong, Chung, Ho Kyoon, Kakihana, Masato, Kenji, Toda, Masaki, Takaki, Yoon, Dae Ho
• Format: Article
• Language: English
• Subjects: Amorphous precursor intermediate; Ca2SiO4:Eu2; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystalline precursor intermediate; Exact sciences and technology; Liquid phase precursor; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Phosphor; Photoluminescence; Physics
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2014.04.133

•High efficiency β-Ca2SiO4:Eu2+ phosphor is synthesized using various precursors.•Precursor intermediates are amorphous and crystalline forms due to the precursors.•Monodisperse phosphor particle grows by the amorphous intermediate precursors.•Morphology and luminescence properties of phosphors are affected on the precursors. Influence of precursor intermediates (PI) on the synthesis of high efficient green emitting β-Ca2SiO4:Eu2+ (β-C2S:Eu) phosphors were demonstrated by a novel liquid-phase-precursor (LPP) method utilizing (a) CaCl2–EuCl3, (b) Ca(NO3)2–EuCl3, (c) CaCl2–Eu(NO3)3, and (d) Ca(NO3)2–Eu(NO3)3 combinations as precursors. The crystallinity and morphology of the PI analyzed using X-ray diffraction and high-resolution transmission electron microscopy measurements showed both the amorphous and crystalline type precursor intermediates (API and CPI) depending upon the metal-source materials. The final morphology and luminescence properties of β-C2S:Eu phosphors were found to be strongly influenced by the crystallinity (amorphous and crystalline) and morphology of the PIs. The APIs have led to regular-shaped homogeneous phosphor particles with higher luminescence when compared with the CPIs.