【摘要】 铕离子作为激活剂在发光材料中应用很普遍，无论是光致发光、电致发光、阴极射线发光或Ｘ射线发光均有其应用。发红光或发蓝光材料，以Ｅｕ离子作激活剂效果最佳，本文报道了几种光转换材料的制备性质与应用，结果表明，在转换自然光方面，ＣａＳ：Ｅｕ达到了令人满意的效果，因为它可将自然光直接转换为作物所需的红光，而使农作物大幅度增产。更多还原

【Abstract】 Eu ion as a activator has been extensively applied to study photoconversion material,and its effect was best. This paper reported the synthesis methods and lumineslent properties of photoconversion mateials which were Y2O3: Eu .Y2O2 : Eu , CaS : Eu and(Ba ,Mg ,Eu ) 3Al14O24 phosphor CaS: Eu could direct convcrsion visible light into red light . which is need the plant grow. CaS: Eu excitation spectra have two peaks 273. 580nm. red region emission is stronger than nearly UV region . So CaS :Eu is best visible light photoconversion material. The body colour of CaS:Eu is red .and decay is longer .so it could be used as a red fluorescent pigment.By using the red plastic flim , we have producted in grow watermelon.moize etc. The amount of the former increased 20 per cent than one using popular plastic flim and the later increased 10 per cent.更多还原