Extending the pi-Conjugation Length of Soluble Semiconducting Polymers to Effect Efficient Charge Transport

延长可溶性半导体聚合物的π共轭长度以实现高效的电荷传输

• 批准号: 1207284
• 负责人: Elsa Reichmanis
• 金额: $ 30.87万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207284&HistoricalAwards=false
• 关键词: Extending; pi; Conjugation; Length; Soluble

TECHNICAL ABSTRACTRealization of polymer architectures with well-defined dimensions and functions is one of the current research challenges in the field of organic semiconducting materials. Materials that meet requisite performance targets and will markedly reduce overall process complexity are essential. The proposal focusses on the design, synthesis and characterization of pi-conjugated polymers having the following characteristics: a low bandgap, a low HOMO level, and effective pi-pi interactions. The aim is to define a strategy for the effective extension of the conjugation length of polymers having electro-optic characteristics. The materials are expected to exhibit enhanced field-effect induced charge transport and photovoltaic properties, features that an imperative for the successful introduction of robust and reliable polymer based devices.Specifically, the PI will (1) investigate the effectiveness of the vinylene linkage to extend the conjugation length of targeted polymers, (2) investigate alternative alkyl side chains and their ability to solubilize targeted polymers in common organic solvents, allowing for solution processing, (3) synthesize alternative D-A architectures, (4) perform requisite physical characterization of the targeted materials, (5) fabricate field effect transistor and photovoltaic devices to evaluate the impact of the approach. Through the studies defined above, it is anticipated that identification of key, synthetically accessible structural features will provide for an extension of the pi-conjugation length of semiconducting polymers with requisite characteristics that will allow for orientation and alignment that are favorable for charge transport. These studies will identify means to achieve energy levels and bandgaps that not only afford desired electro-optic performance, but also support robust and reliable devices.NON-TECHNICAL ABSTRACTConjugated polymeric materials in general, and polymer semiconductors in particular, are of broad interest because of the wide range of possible applications including organic light-emitting diodes (OLED), organic field effect transistors (OFET), photovoltaic devices (PV), electro-optic shutters, printed antennas, plastic-based actuators, and signal switches. Further, polymers offer compatibility with high through-put, low cost processing techniques. The proposed research program will provide essential insight needed for the development and deployment of advanced polymer materials for electro-optic device applications having significant societal impact, examples of which are described above. Students participating in this effort will gain invaluable experience working in a multidisciplinary program. This approach will allow them to experience a broad education and to acquire a sound knowledge base in the area of polymer science and engineering coupled with an appreciation of the contributions of other disciplines. The research program will be integrated with undergraduate and graduate students working in teams to further the objectives of the proposal. Additionally, opportunities will be sought for high school students to participate in these teams. Outreach activities will target the local very diverse community, and both the PI and students will participate. Through these activities, public understanding of STEM will be enhanced, thereby positively influencing a diverse future generation of students to enter STEM fields.

具有明确定义的尺寸和功能的聚合物体系结构的技术抽象化是有机半导体材料领域的当前研究挑战之一。满足必要的性能目标并将显着降低整体过程复杂性的材料至关重要。该提案的重点是具有以下特征的PI偶联聚合物的设计，合成和表征：低带隙，低均匀水平和有效的PI-PI相互作用。目的是定义有效扩展具有电形特征的聚合物的共轭长度的策略。预计该材料将表现出增强的现场效应电荷传输和光伏特性，这对于成功引入了可靠和可靠的基于聚合物的设备的特征是必不可少的。特别是，PI（1）将（1）乙烯基链接的有效性，以研究范围的靶向聚合物的替代性烷基侧链链链链链链链链的构成长度，（2）溶剂，允许溶液处理，（3）合成替代D-A体系结构，（4）对靶向材料进行必要的物理表征，（5）制造现场效应晶体管和光伏设备以评估该方法的影响。 通过上面定义的研究，可以预见，鉴定键合，可访问的结构特征将为具有必要特性的半导体聚合物的PI结合长度扩展，从而允许方向和对齐，有利于电荷运输。 These studies will identify means to achieve energy levels and bandgaps that not only afford desired electro-optic performance, but also support robust and reliable devices.NON-TECHNICAL ABSTRACTConjugated polymeric materials in general, and polymer semiconductors in particular, are of broad interest because of the wide range of possible applications including organic light-emitting diodes (OLED), organic field effect transistors (OFET), photovoltaic devices （PV），电气百叶窗，印刷天线，基于塑料的执行器和信号开关。此外，聚合物提供了与高贯穿，低成本处理技术的兼容性。 拟议的研究计划将为开发和部署高级聚合物材料提供具有重大社会影响的电气设备应用所需的基本见解，例如上述示例。 参加这项工作的学生将获得在多学科计划中工作的宝贵经验。这种方法将使他们能够体验广泛的教育，并在聚合物科学和工程领域获得合理的知识基础，并欣赏其他学科的贡献。该研究计划将与本科生和研究生团队合作，以进一步促进该提案的目标。此外，将寻求机会让高中生参加这些团队。外展活动将针对当地非常多样化的社区，PI和学生都将参加。通过这些活动，将增强对STEM的公众理解，从而积极影响多样的未来学生进入STEM领域。