Control of the Structure and Electronic Structure of Organic/metal Interfaces and the Exploitation of the Electronic Functions

(1)从去年开始继续对有机/金属界面进行检查。用各种电子光谱技术研究了对六苯基（6P）与Au或Mg之间界面的形成，结果表明，6P的生长模式与金属有显著的依赖性，沉积在p表面的金属原子扩散到6P参与者中，特别是在Au的情况下。研究了在超高真空条件下将TPD沉积在不同金属表面形成的界面中，有机层中可能出现的能带弯曲现象。结果表明：在厚度达100nm的界面处，双电层形成完成后，没有出现能带弯曲现象；(2) Al在Alq3上作为阴极沉积时，极薄一层LiF的插入提高了电子注入效率的原因。结果表明：(a)能级排列的改变和(b) Al与Alq3直接接触时强化学相互作用的消除共同作用。(3)将去年在云母上沉积金形成的金（111）表面上的烷烃研究扩展到聚偏氟乙烯在干净结晶铜（111）表面上的体系。红外反射吸收光谱和角分辨紫外光电子能谱证实了取向良好的薄膜的形成。利用这些数据，获得了薄膜生长、界面处有机/金属相互作用以及分子内能带色散关系的详细信息。

(1) The examination of organic/metal interfaces was continued from the last year. The formation of interfaces between p-sexiphenyl (6P) and Au or Mg was pursued with various electronic spectroscopic techniques, and the results indicated that the growth mode of 6P is significantly dependent on the metal, and that the metal atoms deposited onto &P surface diffuse into the 6P player, in particular in the case of Au. The possible band bending in the organic layer was examined for interfaces formed by depositing TPD onto various metals under ultrahigh vacuum. The results show that there is no band bending after the completion of the formation of an electric double layer at the interface up to 100nm thickness.(2) The origin of the enhancement of electron injection efficiency at the insertion of a very thin layer of LiF at the deposition of Al onto Alq3 as the cathode. The results indicated combined contribution of (a) the change of energy level alignment, and (b) the removal of strong chemical interaction between Al and Alq3 at direct contact.(3) The study of alkane on Au(111) surface formed by depositing Au onto mica in the last year was extended to the system of poly(vinylidene fluoride) onto clean crystalline Cu(111) surface. The formation of well-oriented film was demonstrated by infrared reflection-absorption spectroscopy and angle-resolved UV photoelectron spectroscopy. Using these data, detailed information was obtained about the film growth, organic/metal interaction at the interface, and the intramolecular energy-band dispersion relation.