【摘要】 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更多还原

【Abstract】 A metal nanoparticles\|composite thin film (Ag\|BaO), doped by rare\|earth elements, was grown by vacuum deposition. Compared with the normal Ag\|BaO thin film, the photoemission current of the doped Ag\|BaO thin film increases by about 40%. The transmission electron micrograph indicated that Ag nanoparticles become smaller when doped with rare\|earth. With the smaller size of Ag nanoparticles, photoelectrons are easier to transgress from Ag nanoparticles via tunnel effect. Thus the photomission current increases.更多还原