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通过对ＺｎＳ：Ａｇ￣＋薄膜电致发光（ＴＦＥＬ）器件的光学性质的研究，探讨了能获得稳定兰色发光的ＴＦＥＬ器件的制备及有利于ＺｎＳ：Ａｇ￣＋兰色发光的实验条件，同时讨论了光的干涉对ＺｎＳ：Ａｇ￣＋ＴＦＥＬ光谱的影响。在实验中得到的ＺｎＳ：Ａｇ￣＋ＴＦＥＬ光谱是包含几个隆起的宽带，通过计算证明这些隆起的出现与光的干涉有关。Ａｇ￣＋的浓度对ＺｎＳ：Ａｇ￣＋ＴＦＥＬ器件的发光亮度和稳定性有显著的影响，Ａｇ￣＋浓度约为０．０３ｍｏｌ％时，器件亮度较高，稳定性也较好。浓度再大时，亮度和稳定性较低。较高的电压有利于ＺｎＳ：Ａｇ￣＋兰色发光的提高，激发频率也存在一个最佳值。
The optical properties of ZnS: Ag ~ + thin film electroluminescent (TFEL) devices were studied. The preparation of TFEL devices that can obtain stable blue luminescence and the experimental conditions conducive to ZnS: Ag ~ + blue emission were discussed. Simultaneously, The influence of light interference on the spectrum of ZnS: Ag ~ + TFEL is discussed. The ZnS: Ag ~ + TFEL spectra obtained in the experiment are broad bands with several protuberances. It is calculated that the appearance of these protuberances is related to the interference of light. Ag ~ + concentration has a significant effect on the luminescence brightness and stability of ZnS: Ag ~ + TFEL devices. When Ag ~ + concentration is about 0.03mol%, the device brightness is higher and the stability is better. When the concentration is larger, the brightness and stability are lower. Higher voltage is conducive to ZnS: Ag ~ + blue luminescence enhancement, there is an optimum excitation frequency.