基于核心溴化萘二酰亚胺的n型有机场效应晶体管研究
Study on N-type Organic Field Effect Transistor Based on Core Brominated Naphthalene Diimide
设计并合成了一系列核心溴化的萘二酰亚胺(NDI)类有机半导体材料，并且在NDI的氮原子位引入四种不同的取代基。对材料的光电性质进行了表征与分析。从表征结果可知，核心溴化的四种半导体材料具有π-π共轭体系，较低的LUMO能级，具备良好的稳定性。使用十八烷基磷酸（ODPA）作为自组装分子在SiO2/Si衬底上形成薄膜，诱导形成更有序、均匀的有机半导体层。利用X射线衍射和原子力显微镜观察了材料的微观形貌，测试结果显示，ODPA对材料具有修饰作用，四种材料都表现出良好的结晶性。同时，基于这四种材料制备了底栅顶接触结构的有机场效应晶体管，并测试了半导体特性，所有材料均表现出n型载流子传输特性。通过对四种材料的性能进行对比分析，探究了不同分子结构对分子能级、薄膜形态以及器件迁移率的影响。其中化合物NBr-14C由于长烷基链的引入，有利于薄膜生长，拥有最佳器件性能。
半导体技术有机化学工业电子技术概论
有机场效应晶体管萘二酰亚胺小分子材料n型半导体材料
刘子奥,李哲峰.基于核心溴化萘二酰亚胺的n型有机场效应晶体管研究[EB/OL].(2023-06-02)[2025-10-10].http://www.paper.edu.cn/releasepaper/content/202306-6.点此复制
A series of core brominated naphthalimide (NDI) organic semiconductor materials were designed and synthesized, and four different substituents were introduced into the nitrogen atomic of NDI. The photoelectric properties of the materials were characterized and analyzed. According to the characterization results, the four brominated semiconductor materials have π-π conjugated system, low LUMO energy and good stability. Octadecylphosphonic acid (ODPA) was used as a self-assembling molecule to form a thin film on SiO2/Si substrate, which induced the formation of a more ordered and uniform organic semiconductor layer. X-ray diffraction and atomic force microscopy were used to observe the morphology of the materials. The test results showed that ODPA modified the materials, and all the four materials showed good crystallinity. At the same time, field-effect transistors with bottom-gate,top-contact structure were prepared based on these four materials, and their semiconductor properties were tested. All the materials showed n-type carrier transport characteristics. By comparing and analyzing the properties of the four materials, the influences of different molecular structures on molecular energy levels, film morphology and device mobility were investigated. Among them, compound NBr-14C has the best device performance due to the introduction of long alkyl chains, which is conducive to the growth of thin films.
Organic field effect transistorsNaphthalene diimideSmall molecule materialsN-type semiconductor material
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