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引言最近的一些研究结果已经表明:稀土掺杂的碱土硫化物材料对于彩色薄膜电致发光器件是一种很有希望的材料。然而到目前为止,能象ZnS:Mn那样用于商品化平板显示器件的材料只有绿色的ZnS:TbF_x。对于红色发射的CaS:Eu~(2+)和蓝绿色发射的SrS:Ce~(3+),K薄膜,在1k Hz频率驱动下,其亮度分别为170和500cd/m~2。这一亮度对于实际应用来说还是很低的。与此相类似,CaS:Cc~(3+),Cl薄膜在5kHz频率驱动下,
Introduction Some recent research results have shown that rare earth doped alkaline earth sulfide materials are promising materials for color thin film electroluminescent devices. However, until now, only green ZnS: TbF_x can be used as a material for commercial flat panel display devices like ZnS: Mn. For red emission of CaS: Eu ~ (2+) and blue-green emission of SrS: Ce ~ (3 +), K thin films, their luminances are 170 and 500 cd / m ~ 2, respectively. This brightness is very low for practical use. Similarly, CaS: Cc ~ (3 +), Cl film driven at a frequency of 5kHz,