基于电荷转移复合物红外增色效应的有机光敏场效应管制备及性能研究

项目名称： 基于电荷转移复合物红外增色效应的有机光敏场效应管制备及性能研究

项目编号： No.61504082

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 姚博

作者单位： 绍兴文理学院

项目金额： 20万元

中文摘要： 有机红外探测器具有响应度高、响应频谱宽、制备工艺简单和无需低温工作环境等优点，已成为新型红外探测技术研究的热点。恰当选择给体-受体(D-A)体系形成的电荷转移复合物(CTC)薄膜能够在近红外波段有高效吸收。基于CTC薄膜制备兼具有光探测和信号放大功能的有机光敏场效应管(OPT)是实现高性能红外探测器的有效途径，但目前还未见相关研究报道。本项目拟采用基于p型有机小分子和过渡金属氧化物的D-A体系，制备超晶格或体异质结结构的CTC薄膜，并以该薄膜为光敏层搭配高迁移率传输层制备近红外OPT。探寻CTC增色效应与D-A界面能带结构及分子构型的关系；分析激子在CTC-OPT中产生、离解及输运机制；研究电极/CTC薄膜界面的接触特性，并通过引入电极缓冲层等方式改善器件性能。本项目的顺利实施将有望制备高性能的近红外OPT，并为未来有机红外探测器在红外光源检测及成像等方面的大规模应用提供理论与实验依据。

中文关键词： 有机光敏场效应晶体管；电荷转移复合物；增色效应；近红外光电探测器；给体-受体

英文摘要： Infrared organic photodetectors with their advantages of high responsivity, wide response spectrum, simple preparation process and working under the normal temperature have become one of the hot topics in the field of novel infrared detection technology. The charge transfer complexes (CTCs) films formed by the rational choice of the donor-acceptor (D-A) system have efficient absorption at the near-infrared wavelengths. Fabricating organic phototransistors (OPTs) with a dual function of light detection and signal amplification based on CTCs is an effective way to achieve high-performance infrared detector, which has not yet been reported. In this project, CTC films with the structure of superlattice or bulk heterojunction will be prepared based on D-A system formed by p-type small organic molecules and transition metal oxides. Moreover, the near-infrared OPTs will be fabricated by both the CTC photosensitive layer and the high mobility charge-transport layer. The relationships between the CTC hyperchromic effect and D-A interface band structure (or molecular configuration) will be investigated. The generation, dissociation and transport mechanisms of excitons in the CTC-OPTs will be analyzed. The contact properties in the interface between electrodes and CTC-films will be studied, so as to improve the devices’ performances by introducing the electrode buffer layer. The smooth implementation of the project will help fabricate high performance near-infrared OPTs and provide theoretical and experimental basis for future large-scale application of OPTs in the infrared light detection and imaging.

英文关键词： organic phototransistor;charge-transfer complexe;hyperchromic effect;near-infrared photodetector;donor-acceptor