Elucidation and Control of Interfaces Related to Organic Electronic Devices

1.高度有序的有机薄膜的UPS研究给出了非常尖锐的光谱特征，导致澄清的电子结构的变化的分子顺序和电荷转移速率在有机/金属界面。我们还观察到并五苯分子在清洁金属表面上的能级分裂，并可以确定其能带色散.系统地研究了有机半导体的能带弯曲，与无机半导体相比，有机半导体通常在名义上是未掺杂的。结果表明，在某些情况下，弯曲并不发生，适当的掺杂可以用来引起和控制弯曲，例如增强载流子注入.有机半导体材料的电学特性受气氛（如空气和O_2）的影响很大。从界面电子结构的角度对酞菁氧钛的这种作用进行了研究，结果表明，氧使在真空中制备的酞菁氧钛薄膜向下弯曲 ...更多信息 uum（HV）向上弯曲，这归因于氧作为受主掺杂.开发了适用于从特高压到大气环境的各种环境下的电测量新装置，包括热电功率和位移电流，并获得了详细的信息，例如载流子注入。发展了检测有机薄膜电子结构的新方法，包括光电子显微镜、高分辨反向光电子能谱和X射线发射光谱.发现并阐明了有机界面上的复杂现象，如有机分子的运动、金属原子在有机膜中的扩散、巨表面势的形成等.理论计算了有机/金属界面的电子结构和有机分子沉积对金属功函数的影响。与实验结果吻合较好.测定了作为有机太阳能电池新型电解质而备受关注的新型有机半导体和离子液体的电子结构。少

1. UPS study of highly ordered organic films gave very sharp spectral features, leading to the clarification of change of electronic structure by molecular order and charge transfer rate at organic/metal interface. We also observed the splitting of the molecular levels for pentacene on clean metal surfaces, and the energy band dispersion could be determined.2. Possible band bending was systematically examined for organic semiconductors which are usually used nominally undoped, in contrast to inorganic semiconductors. The results revealed that bending does not occur for some cases, and that appropriate doping can be used to cause and control the bending, e.g. for enhanced carrier injection.3. The electrical characteristics of organic semiconductors are much affected by atmosphere (e.g. air and O_2). The study of such effect for titanyl phthalocyanine from the viewpoint of interfacial electronic structure showed that oxygen converts the downward bending of films prepared in ultrahigh vac … More uum (HV) to upward bending, This was ascribed to the doping by oxygen working as acceptor.4. New apparatuses of electrical measurements, were developed for under various environments from UHV to gas atmosphere, including thermopower, and displacement current, and detailed Information, e.g. on carrier injection was obtained.5. New methods for examining the electronic structures of organic films were developed, including photoelectron microscopy, high-resolution inverse photoemission, and X-ray emission spectroscopy.6. Complex phenomena at organic interfaces, e.g. motion of organic molecules, diffusion of metal atoms in organic films, and giant surface potential formation, were found and clarified.7. Theoretical calculations were performed on the electronic structure of organic/metal interfaces and the change of metal work function by deposition of organic molecules. They gave good agreement with experimental results.8. Electronic structures of new organic semiconductors and ionic liquids, which attract attention as new electrolyte for organic solar cell, were determined. Less