金纳米粒子增强光电器件性能研究：光学效应与电学效应的综合应用

项目名称： 金纳米粒子增强光电器件性能研究：光学效应与电学效应的综合应用

项目编号： No.51473052

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 刘琳琳

作者单位： 华南理工大学

项目金额： 78万元

中文摘要： 金属纳米粒子可以通过光学效应和电学效应有效的增强光电器件性能，是近年来研究的热点。本项目拟利用金属纳米粒子光学和电学的综合效应，针对金属纳米粒子光电器件应用中两个重要的科学问题，即局域表面等离子共振效应对光吸收发射的增强和金属纳米粒子表面势垒在功函及电荷捕获中的作用，在发光器件中（P-PPV、superyellow为活性层），利用有机共轭分子载流子传输的不平衡性和激子分布的不均匀性，使光发射主区域与纳米粒子发射增强区实现有效的重叠提高激子利用率，利用纳米粒子与缓冲层的相互作用降低注入势垒提高电流密度；在光响应器件中（PTB7为活性层），利用光吸收的逐步衰减特性，使光吸收主区域与纳米粒子吸收增强区有效重叠提高光吸收，利用纳米粒子的载流子捕获降低暗电流，希望实现器件综合性能的有效提升。并在总结金属纳米粒子增强机理、增强规律和增强限度的基础上，探索其进一步在光电器件中的综合应用。

中文关键词： 共轭聚合物；有机电致发光器件；复合材料；自组装；有机光电材料

英文摘要： The performance of optoelectric device can be effectively enhanced through optical effect and electrical effect of metal nanoparticles, which is a research hotspot in recent years. This project intends to use the comprehensive optical and electrical effect of metal nanoparticles, hoping to deliver improved device integrated performance. We focus on two of the most important scientific problems in metal nanoparticles based application in the optoelectric device: the local surface plasmon resonance effect for the emission and absorption enhancement and the role of metal nanoparticles surface barrier on the work function and charge capture. In light-emitting device, the area of nanoparticles based emission enhancement can effectively overlap with light emitting profile to improve the emission efficiency, which based on the imbalance of organic conjugated molecule carrier transmission and exciton distribution inhomogeneity; and the interaction between nanoparticle and buffer layer can reduce injection barrier and improve current density. In photodetector, the area of nanoparticle based absorption enhancement can effectively overlap with the main absorption area in device to improve light absorption, which based on Beer's law of the light absorption; and the dark current can be lowered by nanoparticle based carrier capture. The enhancement mechanism of metal nanoparticles is summarized on the basis of exploring their further comprehensive application in optoelectronic devices.

英文关键词： conjugated polymer;organic electroluminescence device;Composite;self-assembly;organic optoelectronic materials