在本文的工中．对于加速层我们分别研究了ＳｉＯ２和ＺｎＳ两种材料的加速作用及采用这两种材料作为加速层的器件的传导电荷情况，实验结果表明ＺｎＳ作加速层的电荷注入能力优于ＳｉＯ２作加速层；但是后者对热电子的加速作用明显优于前者，而且在同等条件下，以ＳｉＯ２作加速层的器件的亮度明显高于ＺｎＳ作加速层的器件。 In this article’s work. For accelerating layer, we studied the accelerating effect of both SiO2 and ZnS materials and the conduction charge of the devices using these two materials as accelerating layer respectively. The experimental results show that the charge injection ability of ZnS as accelerating layer is better than SiO2 as accelerating layer. However, the latter accelerates the thermoelectrons obviously better than the former, and under the same conditions, the device with SiO2 accelerating layer is obviously higher in brightness than the ZnS accelerating layer.