放电处理高分子薄膜场致发射阴极的研究

考察了聚苯胺（PANI—CSA）、聚对苯乙烯磺酸（PEDOT）、聚乙烯咔唑（PVK）和聚甲基丙烯酸甲酯（PMMA）4种高分子薄膜经放电处理后的场致电子发射性能．首先将这些材料配制成溶液分别在ITO玻璃衬底上旋涂成膜，放入真空测试箱中，通过放电处理这些薄膜的表面；再将处理好的薄膜作为阴极发射体．文中比较了这些薄膜的场致发射阈值电压、电流一电压特性曲线以及相应的福勒一诺德海姆（F-N）曲线，测试了这4种高分子薄膜的电导率，比较电导率对放电处理结果的影响．实验证明，电场作用下高分子薄膜的电子发射能力和电导率有关，具较高电导率的高分子薄膜经表面放电处理后其发射能力更强．

Investigation into Polymer Films as Field Emission Cathode Conditioned by Electric Discharge

The characteristics of the field electron emission of four polymer films(PANI-CSA:polyaniline-camphor sulfonic acid,PEDOT:poly(ethylenedioxythiophene),PVK:poly(N-vinyl-carbazole) and PMMA:poly(methyl methacrylate)) conditioned by the electric discharge were investigated in this paper.During the investigation,the four films were first prepared by coating the corresponding solutions on ITO(indium tinoxide) glass,which were next used as the field emission cathode after the superficial treatment by electric discharge in a vacuum testing case.The threshold voltages,current and voltage I-V characteristics and corresponding Fowler-Nordheim(F-N)plots of the four films were then compared each other,and the conductivities were finally tested to find out how the conductivity influences the electric discharge effect.Experimental results indicate that,in an electric field,the electron emission ability of polymer film has larger conductivity after relates to the conductivity,and becomes stronger when the polymer film conditioned by electric discharge.