Conjugated polymer surfaces and interfaces
Conjugated polymer surfaces and interfaces
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共轭聚合物表面和界面
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
W. R. Salaneck
中科院分区：
文献类型：
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作者：
W. R. Salaneck
1977年，共轭聚合物聚乙炔的掺杂达到了高导电性的状态，这标志着人们对导电有机材料的电子和输运性质感兴趣的一个独特的步骤。然而，自1990年以来，未掺杂的半导体共轭聚合物已成为各种电子和光电应用中潜在有用的电子材料。在基于聚合物的电子器件应用的背景下，理解聚合物表面和聚合物-金属界面的电子结构的性质是至关重要的。它已被证明，特别是共轭聚合物，光电子能谱提供了一个单一的测量技术内的化学和电子结构信息的最大量。这一贡献包含一个概述的界面形成的早期阶段与共轭聚合物和模型分子固体的表面上的金属，使用光电子能谱研究的一些细节。所选择的材料尤其与基于聚合物的发光器件或LED有关。具体而言，所涉及的材料包括聚（对苯撑亚乙烯基），或PPV，和一系列取代的PPV，以及PPV的二苯基多烯分子，即α，ω-二苯基十四庚烯。指出了轻金属原子在共轭聚合物清洁表面上行为的一些一般趋势。一些后果，根据审查的研究中获得的信息，突出显示。最后，最近的两个问题，这是研究所使用的方法的金属对聚合物界面的研究，包括：PPV的电子结构上的水蒸气的作用;和使用相分离的聚合物共混物，以增加蓝色发光二极管的量子效率。
The doping of a conjugated polymer, polyacetylene, to a state of high electrical conductivity in 1977 marked a distinct step in interest in the electronic and transport properties of electrically conducting organic materials. Since 1990, however, undoped semiconducting conjugated polymers have emerged as potentially useful electronic materials in a variety of electronic and optoelectronic applications. In the context of polymer–based electronic device applications, it is of critical importance to understand the nature of the electronic structure of the polymer surface and the polymer–metal interface. It has been shown that, especially for conjugated polymers, photoelectron spectroscopy provides a maximum amount of both chemical and electronic structural information within a single measurement technique. This contribution contains an overview of some details of the early stages of interface formation with metals on the surfaces of conjugated polymers and model molecular solids, as studied using photoelectron spectroscopy. The materials chosen are especially of interest in connection with polymer-based light emitting devices, or LEDs. Specifically, the materials involved include poly(p–phenylenevinylene), or PPV, and a series of substituted PPVs, as well as a diphenylpolyene molecule for PPV, namely, α,ω–diphenyltetradecaheptaene. Some general trends in the behaviour of light–metal atoms on the clean surfaces of conjugated polymers are pointed out. Some consequences, based upon the information obtained in the studies reviewed, are highlighted. Finally, two recent issues, which are studied by the methods used for the metal–on–polymer interfaces studies, are covered: the role of water vapour on the electronic structure of PPV; and the use of phase–separated polymer blends to increase the quantum efficiency of blue light emitting diodes.