Pyromellitic Diimide (PyDI)-Based Molecular and Polymeric Electron-Transporting Semiconductors

均苯四甲酸二酰亚胺 (PyDI) 基分子和聚合物电子传输半导体

• 批准号: 0905176
• 负责人: Howard Katz
• 金额: $ 29.98万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0905176&HistoricalAwards=false
• 关键词: Pyromellitic; Diimide; PyDI; Based; Molecular

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."TECHNICAL SUMMARY: Pyromellitic (benzenetetracarboxylic) diimides (PyDIs) are best known as segments of highly insulating polyimide dielectrics This proposal is to build on the transformative concept that a simple PyDI structure is a sufficiently conjugated core for the construction of electron-carrying organic semiconductors for polymer-based electronics and energy transducers. This structure is more readily available than the higher rylenes already investigated, is highly transparent and chemically stable, and leads to processable and electronically tunable derivatives. While numerous small-molecule and polymeric hole-carrying (p-channel) semiconductors have been developed, the list of electron-carrying (n-channel) alternatives, while growing, remains smaller. There are particularly few examples of processable n-channel semiconductors. Most conjugated cores for n-semiconductors have very high melting points. Those few that are solution processable require extensive syntheses. This proposal develops the counterintuitive idea that PyDIs can function as molecular and polymeric semiconductors in transistors and other devices. The PI has already shown that PyDI semiconductors can have electron mobilities 0.1 cm2/Vs. Transistors made from PyDI derivatives are operable in air and have very high on/off ratios. This proposal is to perform a systematic study of N and 3,6-C substitution on PyDIs, develop solution processability, and extend these structures into printable polymers. Fundamental issues to be addressed include the electron energy level tunability through substitution, relative merit of PyDI and naphthalenetetracarboxylic diimides, preservation of solid state packing in processable solids, comparison of conjugated and nonconjugated substituents and polymer linkages, reliability of molecular solids versus polymers, and enhanced viscosities of polymer solutions for printing. The morphology and crystal structures will be determined for a wide range of derivatives, as will the orbital energy levels relative to other materials in which the PyDIs might be blended or with which they might share interfaces.NONTECHNICAL SUMMARY: New organic and polymeric materials, though based on a structure generally associated with insulators, will in this case further opportunities for organic based circuit, solar cell, capacitor, and thermoelectric technologies. They will be utilized in modules for undergraduate and high school laboratory course teaching. One particular course is being developed specifically to utilize organic electronic devices, and will be transferred to predominantly undergraduate institutions such as Drew University and University of Maryland-Baltimore County, and Anne Arundel High School. The modules will also be presented to high school teacher workshops that include a diverse mix of attendees from urban school districts. Mentoring of graduate and undergraduate students, including joint and visiting minority students from Howard University, will be emphasized.

“该奖项是根据 2009 年美国复苏和再投资法案（公共法 111-5）提供资金的。” 技术摘要：均苯四甲酸（苯四甲酸）二酰亚胺 (PyDI) 最为人所知的是高绝缘聚酰亚胺电介质部分。该提案的基础是这一变革性概念是，简单的 PyDI 结构是一个充分共轭的核心，可用于构建用于基于聚合物的电子器件和能量传感器的载电子有机半导体。 这种结构比已经研究的高级萘嵌苯更容易获得，具有高度透明性和化学稳定性，并产生可加工和电子可调的衍生物。 虽然已经开发出许多小分子和聚合物载空穴（p 沟道）半导体，但载电子（n 沟道）替代品的列表虽然在不断增长，但仍然较小。 可加工的n沟道半导体的例子特别少。 大多数 n 型半导体的共轭核具有非常高的熔点。 那些少数可溶液加工的物质需要大量的合成。 该提案提出了一个违反直觉的想法，即 PyDI 可以在晶体管和其他设备中充当分子和聚合物半导体。 PI 已经表明 PyDI 半导体的电子迁移率可达 0.1 cm2/Vs。 由 PyDI 衍生物制成的晶体管可在空气中工作，并且具有非常高的开/关比。 该提案旨在对 PyDI 上的 N 和 3,6-C 取代进行系统研究，开发溶液加工性能，并将这些结构扩展到可打印聚合物中。 要解决的基本问题包括通过取代调节电子能级、PyDI 和萘四甲二酰亚胺的相对优点、可加工固体中固态堆积的保存、共轭和非共轭取代基和聚合物键的比较、分子固体与聚合物的可靠性以及增强用于印刷的聚合物溶液的粘度。 各种衍生物的形态和晶体结构将被确定，相对于 PyDI 可能混合或共享界面的其他材料的轨道能级也将被确定。 非技术摘要：新的有机和聚合材料基于通常与绝缘体相关的结构，在这种情况下将为有机基电路、太阳能电池、电容器和热电技术提供更多机会。 它们将用于本科和高中实验室课程教学的模块。 正在专门开发一门专门利用有机电子器件的课程，并将转移到德鲁大学、马里兰大学巴尔的摩分校和安妮阿伦德尔高中等本科院校。 这些模块还将提交给高中教师研讨会，其中包括来自城市学区的不同参与者。将强调对研究生和本科生的指导，包括来自霍华德大学的联合学生和访问少数族裔学生。