Preparation of hydrophobic calcium carbonate phosphors and its application in fluorescent films

Abstract

The exploration of new light conversion agents is of great importance because they make full use of solar energy and can be applied in the agricultural film field. In our research, hydrophobic CaCO3:Eu3+ phosphors were in-situ prepared by carbonization method and then applied to the fabrication of the polyethylene (PE) films. Under the irradiation of ultraviolet light, the polyethylene film emits orange-red light. Furthermore, the dispersity of hydrophobic CaCO3:Eu3+ phosphor in the PE film is better than that of unmodified CaCO3:Eu3+ phosphor. Good dispersion endows the PE film much more uniform red luminescence under ultraviolet excitation. In addition, compared with the unmodified CaCO3:Eu3+ phosphors, hydrophobic CaCO3:Eu3+ phosphors can make the PE film emit much stronger red light. Low ultraviolet transmittance and good visible light transmittance make polyethylene film have potential application in agricultural film.