960化工网
Low-temperature preparation of monodispersed Eu-doped CaTiO3 LED phosphors with controllable morphologies
Bin Wu,Qinghong Zhang,Hongzhi Wang,Yaogang Li
CrystEngComm Pub Date : 01/12/2012 00:00:00 , DOI:10.1039/C2CE06366B
Abstract

A novel solvothermal route has been developed to synthesize mondispersed and different mophologies of Eu-doped CaTiO3 phosphors including magic-column spherical, magic-cube spherical and polyhedral shaped, using a mixture of ethylene glycol (EG) and ethylenediamine (EDA). By tuning the solvent ratio, the method exhibited excellent control over the morphology of CaTiO3:Eu3+, and magic-column spherical phosphors have higher luminous intensities than magic-cube spherical and polyhedral shaped phosphors. The synthesized phosphors had higher luminous intensity and better packing properties than those obtained by a solid-state method. The phosphors showed strong red emissions, corresponding to the 5D07F2 (617.6 nm) transition of Eu3+ under near-ultraviolet excitation (398.4 nm). X-ray diffraction (XRD), scanning electron microscope (SEM) and photoluminescent (PL) analyses were used to characterize the structure, morphology and luminous performance of CaTiO3:Eu3+ phosphors.

Graphical abstract: Low-temperature preparation of monodispersed Eu-doped CaTiO3 LED phosphors with controllable morphologies
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