CAREER: Micro-structure and Electrical Properties in Thin Films of Semicrystalline Conjugated Polymers

职业：半晶共轭聚合物薄膜的微观结构和电性能

• 批准号: 0645488
• 负责人: Alberto Salleo
• 金额: $ 60.94万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-01 至 2012-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0645488&HistoricalAwards=false
• 关键词: CAREER; Micro; structure; Electrical; Properties

Technical: This project addresses the micro-structure and electrical properties in thin films of semicrystalline conjugated polymers with emphasis on understanding structure/transport relationships; the micro-structure includes crystalline grains, grain boundaries and amorphous material. The project will utilize poly(thiophenes) and poly(thieno-thiophenes), considered as high-performance polymeric semiconductors. The approach parallels that used with heteroepitaxy and graphoepitaxy to achieve long-range order. Scanning probe techniques, high resolution synchrotron-based X-ray diffraction, and in situ thermal annealing studies will be conducted along with molecular dynamics (MD) simulations of micro-structure evolution. Coupled electrical and optical characterization to separate the effect of different aspects of the micro-structure on the materials' performance will be carried out, and experimental measurements will be augmented by modeling of charge transport. The density-of-states of the semiconductor will be characterized with sub-bandgap absorption spectroscopies. Non-technical: The project addresses basic research issues in a topical area of materials science having high technological relevance. The project provides unique opportunities for graduate and undergraduate training in an interdisciplinary field. In addition to Stanford undergraduates, the PI will work pro-actively to attract underrepresented minority students to his laboratory through an Engineering Diversity Program (EDP). The research will also be used as a vehicle to "re-excite" local high-school Science teachers participating in an outreach program. The PI plans to lecture at local high schools and participate in national outreach days organized by EDP.

技术：该项目介绍了半结构结合聚合物的薄膜中的微结构和电性能，重点是理解结构/运输关系；微结构包括晶粒，晶界和无定形物质。该项目将利用聚（硫代）和聚（硫苯基噻吩），被视为高性能聚合物半导体。该方法与异性恋和图形上的epoepitaxy一起使用以达到远程顺序。扫描探针技术，高分辨率基于同步加速器的X射线衍射以及原位热退火研究将与微结构演化的分子动力学（MD）一起进行。将进行耦合的电气和光学表征，以分离微结构的不同方面对材料性能的影响，并通过对电荷传输的建模来增强实验测量。半导体的密度将以亚带吸收光谱镜来表征。非技术：该项目解决了具有高技术相关性的材料科学局部研究领域的基础研究问题。该项目为跨学科领域的研究生和本科培训提供了独特的机会。除斯坦福大学的本科生外，PI还将通过工程多样性计划（EDP）积极地工作，以吸引代表性不足的少数民族学生进入其实验室。该研究还将用作“重新兴趣”参加外展计划的本地高中科学教师的工具。 PI计划在当地高中讲授，并参加由EDP组织的国家外展日。