Two‐ step synthesis and luminescent properties of BaB2O4:Eu3+ nano/microphosphors prepared from Ba‐B‐O:Eu3+ precursor

Abstract The BaB 2 O 4 :Eu 3+ nano/microphosphors with sphere‐, rod‐, and granular‐like morphologies were successfully obtained by a two‐step method using Ba‐B‐O:Eu 3+ 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 3+ and BaB 2 O 4 :Eu 3+ were proposed. The results show that the BaB 2 O 4 :Eu 3+ could retain the original morphologies of their respective precursors largely. The BaB 2 O 4 :Eu 3+ 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 2 O 4 :Eu 3+ 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.