极性共轭聚合物在聚合物太阳电池中作为阴极界面层的作用机理研究

项目名称： 极性共轭聚合物在聚合物太阳电池中作为阴极界面层的作用机理研究

项目编号： No.51273077

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 李枫红

作者单位： 吉林大学

项目金额： 80万元

中文摘要： 使用醇溶解的电中性极性共轭聚合物（NPCPs）作为阴极界面层可大幅提高聚合物太阳电池（PSCs）等器件性能。该方法简单易行、环境友好且具有普适性，所以引起高度关注。目前人们对NPCPs在PSCs中的作用机理已提出一些观点，但还有许多未解决的问题，仍需进行深入研究,以进一步发展NPCPs材料和它们在PSCs中的应用。在本申请中我们将采用创新的薄膜剥离技术对真实PSCs中的活性层/NPCP/金属界面进行研究。紫外光电子能谱、X射线光电子能谱和近边X射线吸收精细结构谱的共同使用将对这个复合界面的能级排列、界面偶极、化学结构及层与层之间的物理、化学相互作用和分子取向给予全面地描述，解释NPCP层的引入对器件性能参数的影响。通过对各种NPCPs与活性层及金属界面电子与化学结构的系统研究与深入认识，揭示NPCPs作为阴极界面层的具体作用机理，为新型NPCPs材料设计和器件结构优化提供指导。

中文关键词： 聚合物太阳电池；阴极界面层；作用机理；极性共轭聚合物；极性有机小分子

英文摘要： Alcohol soluble neutral polar conjugated polymers (NPCPs) as cathode interlayers have attracted considerable attention because they not only effectively increase the device efficiency but also can be processed by easy and environmentally friendly solutions in polymer optoelectronic devices. Though NPCPs have been successfully used in many polymer solar cells (PSCs) and some explanations have been proposed, exact mechanism of their function as a cathode interlayer is not very clear so far. In order to further develop NPCPs and their applications in PSCs, it is necessary to carry out more intensive studies to reveal the working mechanism of an NPCP ultrathin film between active layer and cathode in PSCs. Hereby we shall invesigate active layer/NPCP/metal interface in a real PSC by means of a novel peel-off technique. Combined ultraviolet photoemission spectroscopy (UPS), x-ray photoemission spectroscopy (XPS) and near edge x-ray absorption fine structure (NEXAFS) techniques will provide important information of the interfacial properties such as energy level alignment, interface dipole, chemical structures, interactions of NPCPs and cathode (or active layer) as well as the molecular orientations. As a result the spectroscopic findings can explain effects of the NPCP ultrathin film as a cathode interlayer on device

英文关键词： polymer solar cells；cathode interlayer；workiing mechanism；polar conjugated polymers；polar organic small molecules