高度有序有机超分子的原位自组装及其光电性质

项目名称： 高度有序有机超分子的原位自组装及其光电性质

项目编号： No.51303185

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 甄永刚

作者单位： 中国科学院化学研究所

项目金额： 26万元

中文摘要： 溶液法制备光电器件主要在于条件温和、易于大面积制备、工艺和设备简单、成本低。但是，大多有机光电小分子是高度共轭的芳香体系，溶解性差，不利于溶液处理和自组装；柔性基团的引入可增加其溶解度，却降低了功能单元的密度，并能阻碍分子间π-π堆积作用等非共价键弱作用，影响分子紧密堆积，从而导致器件性能变低。我们设计合成有机光电全共轭小分子可溶性前体，便于溶液处理加工。通过较低温度的热转换条件，高效地转换为不溶性的、有机光电全共轭小分子，并进一步通过氢键、π-π堆积作用等分子间作用力，原位自组装为高度有序、堆积紧密的有机光电超分子。通过相关谱学和电子器件的构筑，研究全共轭有机超分子的光电性质、电荷传输机理和传输特性，揭示基于氢键作用的全共轭超分子的本征性能，探索其光电器件的潜在应用。并通过对超分子结构与光电性能关系的研究，指导设计新型有机光电超分子的原位自组装。

中文关键词： 自组装；有机半导体；电荷传输；晶相；晶体工程

英文摘要： Although solution processed opto-eletronic devices feature mild conditions, large area, simple procedure and low cost, lots of organic opto-electronic small molecules have very poor solubilty in common organic solvents due to the highly conjugated aromatic system.The introduction of flexible and nonconjugated substitutes can enhance the solbubity but decrease the density of chromophores and disturb the π-stacking and other nonbonding intermolecular interactions, leading to a low charge carrier mobility. Therefore, we design to synthesize the well-soluble precursor of highly conjugated small organic molecules for facile solution processable procedure. By accessible and moderate thermal convesion, totally insoluble organic conjugated organic small molecules can be achieved in a very high efficiency and continue to in situ self assembly into well-oredered supramolecule by hydrogen bonding and π-stacking. The opto-electronic properties including the charge transporting behaviors are expected to be investigated systematically by spectroscopic techiques and electronic device fabrication. The exploration of the intrinsic opto-electronic properties will shed light on the potential applications of elctronic devices. More importantly, the good understanding on the relationship between the supramolecular structure and the

英文关键词： self assembling；organic semiconductors；charge transport；crystal polymorphs；crystal engineering