Abstract
A novel Bi2O2CO3:Eu3+ phosphor with different morphologies was successfully synthesized by the urea-based precipitation method without using any surfactants. The diverse morphologies of the samples have been easily realized in an ethanol/water mixed solution system by controlling the proportions of ethanol to water. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR) and UV–vis absorption spectroscopy are used to characterize products. Studies on the photoluminescence (PL) properties of Bi2O2CO3:Eu3+ phosphors indicate that the PL intensity of different morphologies is dependent on crystallinity and size uniformity. Besides, the photoluminescence intensity of uniform nanosheet Bi2O2CO3:Eu3+ phosphor (S3) is higher than other morphologies when excited by 395nm wavelength. The optimum doping concentration of phosphor prepared by ethanol solvent is 0.08 and concentration quenching occurs among nearest-neighbor ions. The CIE coordinate is also in close proximity to the standard of red light (0.67, 0.33); therefore the prepared Eu3+ doped products may be a promising red phosphor candidate in white light-emitting diodes field.
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