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。用各种电子能谱技术研究了6P与Au或Mg之间界面的形成，结果表明，6P的生长方式与金属密切相关，沉积在&P表面的金属原子向6P分子扩散，尤其是Au。研究了在超高真空条件下，在不同金属表面沉积TPd形成的界面，有机层中可能出现的能带弯曲。结果表明，在界面处形成厚度达100 nm的双电层后，没有出现能带弯曲现象。(2)在Al作为阴极的Alq3上沉积了一层很薄的LiF，这是电子注入效率提高的原因。结果表明：(A)能级排列的变化和(B)Al与Alq3在直接接触时强化学相互作用的消除是综合作用的结果。(3)过去一年在云母上沉积Au而形成的Au(111)表面烷烃的研究扩展到清洁晶态的Cu(111)表面上的聚偏氟乙烯体系。红外反射吸收光谱和角度分辨紫外光电子能谱表明薄膜具有良好的择优取向。利用这些数据，获得了关于薄膜生长、界面上的有机/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.