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采用 Na-2S_x 和 K_2S_x 为助熔剂合成了红色发光的 Eu 掺杂 CaS 荧光粉。在光子和电子激发下,这种荧光粉具有中心位于645nm 左右的宽带发射。获得了约为标准荧光粉(Y_2O_2S:Eu)20%和25%的效率。用 K_2S_x 制备出非常好的橙光发射 Mn 掺杂 CaS 荧光粉。
Red-emitting Eu-doped CaS phosphors were synthesized using Na-2S_x and K_2S_x as fluxes. Under photon and electron excitation, this phosphor has a broadband emission centered around 645 nm. An efficiency of about 20% and 25% of the standard phosphor (Y 2 O 2 S: Eu) was obtained. A very good orange emitting Mn-doped CaS phosphor was prepared with K_2S_x.