Synthesis of Ce3+ and Mn2+ codoped calcium carbonate phosphor emitting by black light irradiation and its fluorescence property

This paper reports about synthesis and fluorescence properties of Ce3+ and Mn2+ codoped calcium carbonate phosphor emitting by black light irradiation. Ce3+ and Mn2+ codoped vaterite phosphor was synthesized with liquid phase reaction by adding 0.10 mol . dm(-3) (NH4)(2)CO3 solution into 0.10 mol . dm(-3) CaCl2 solution including Ce (NO3)(2) and MnCl2 at 35 degrees C. The optimum excitation wavelength of Ce3+ doped vaterite phosphor with Ce/Ca atomic ratio 0.006 was observed at 322 nm. The emission wavelength of the vaterite phosphor excited with 322 nm light was 367 and 385 nm in the near ultraviolet radiation region. The emission of Ce3+ and Mn2+ codoped vaterite phosphor excited with 322 nm light was observed about 640 nm and the emitted color was red emission. The largest emission was observed to the vaterite phosphor prepared from synthetic conditions of (Ce + Mn) /Ca atomic ratio 0.058 and Mn/(Ce + Mn) atomic ratio 0.67.