The BaB O :Eu nano/microphosphors with sphere-, rod-, and granular-like morphologies were successfully obtained by a two-step method using Ba-B-O:Eu as the precursor. The structure, morphology and photoluminescent properties of the products were characterized by Fourier transfer infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and photoluminescence (PL). The formation mechanisms of Ba-B-O:Eu and BaB O :Eu were proposed. The results show that the BaB O :Eu could retain the original morphologies of their respective precursors largely. The BaB O :Eu prepared by this two-step method exhibited better morphology, smaller particle size and better crystallinity than when prepared by a solid-state method. The granular-like BaB O :Eu red phosphor prepared by this two-step method exhibited stronger PL intensity and better red color purity than when prepared by a solid-state method.
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