用真空蒸发沉积的方法制备了掺杂稀土的金属纳米粒子 介质复合薄膜 (Ag BaO薄膜 ) .与不掺杂稀土的Ag BaO薄膜相比 ,其光电发射能力提高了近 40 % .透射电镜分析表明 ,掺杂稀土后 ,Ag BaO薄膜中的Ag纳米粒子明显细化、球化、密度增大 .这表明Ag纳米粒子的细化 ,使得其在光作用下 ,光电子更容易通过隧道效应穿过界面位垒逸出 ,导致光电发射能力增强 The rare earth-doped metal nanoparticle dielectric composite thin films (Ag BaO thin films) were prepared by vacuum evaporation deposition, and their photoemission capacity was increased by nearly 40% compared with the undoped Ag BaO thin films. Transmission electron microscopy , After doping with rare earth, the Ag nanoparticles in Ag BaO thin film are obviously refined, spheroidization and density increase, which shows that the thinning of Ag nanoparticles makes it easier for the photoelectrons to pass through the interface through the tunnel effect under the action of light Barrier escaped, leading to enhanced photoemissive ability