EAGER: Superlattice-induced polycrystalline and single-crystalline structures in conjugated polymers

非技术：聚合物半导体在柔性电子领域很有前途。然而，它们的载流子迁移受到高度无序的薄膜形态和陷阱主导的电荷传输的限制。因此，如何减少其无序性并充分发挥共轭聚合物在电荷传输方面的潜力仍然是一个巨大的挑战。本项目的目的是探索一种以二维金属卤化物钙钛矿（MHP）单晶作为相互作用衬底的聚合物半导体单晶外延生长方法。如果成功，它将允许直接测量聚合物半导体内部和链间的电荷传输。由于陷阱缺陷较少，有可能观察到前所未有的电荷输运。这项工作将为共轭聚合物异质外延晶体的生长提供基础性的见解。本文研究的技术可以在未来进一步发展，用于更大规模的组装和对聚合物半导体中电荷输运的结构-性质关系的系统研究。打破共轭聚合物的无序主导电荷输运限制可能会将该领域提升到一个新的水平，并为各种光电和传感应用开辟了以前无法实现的新应用。这里调查的材料可以很容易地整合到教学、教育和推广中。技术：聚合物半导体在柔性电子领域很有前途。然而，它们的载流子迁移受到高度无序的薄膜形态和陷阱主导的电荷传输的限制。因此，如何减少其无序性并充分发挥共轭聚合物在电荷传输方面的潜力仍然是一个巨大的挑战。本项目的目的是探索一种以二维金属卤化物钙钛矿（MHP）单晶作为相互作用衬底的聚合物半导体单晶外延生长方法。如果成功，它将允许直接测量聚合物半导体内部和链间的电荷传输。由于陷阱缺陷较少，有可能观察到前所未有的电荷输运。聚合物半导体的制备将系统地研究单晶结构形成和电荷输运的结构性质关系。各种类型的二维钙钛矿单晶将被用作模板来指导有机半导体低聚物和聚合物的组装。这项工作将为共轭聚合物异质外延晶体的生长提供基础性的见解。本文研究的技术可以在未来进一步发展，用于更大规模的组装和对聚合物半导体中电荷输运的结构-性质关系的系统研究。打破共轭聚合物的无序主导电荷输运限制可能会将该领域提升到一个新的水平，并为各种光电和传感应用开辟了以前无法实现的新应用。这里调查的材料可以很容易地整合到教学、教育和推广中。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

NON-TECHNICAL:Polymer semiconductors are promising for flexible electronics. However, their charge carrier mobilities are limited by the highly disordered thin film morphology and trap-dominated charge transport. Thus, it remains a grand challenge to reduce the disorder and realize the full potential of conjugated polymers for charge transport. The goal of this project is to explore a method for epitaxial growth of polymer semiconductor single crystals with two-dimensional metal halide perovskite (MHP) single crystals as interacting substrates. If successful, it will allow direct measurement of intrinsic intra- and interchain charge transport in polymer semiconductors. With less defects as traps, it may be possible to observe unprecedented charge transport. This work will provide fundamental insights on conjugated polymer heteroepitaxial crystal growth. The techniques investigated here may be further developed in the future for larger-scale assembly and for systematic investigation of the structure-property relationship for charge transport in polymer semiconductors. Breaking the disorder-dominated charge transport limit of conjugated polymers may potentially bring the field to a new level and opens new applications previously not possible for various optoelectronic and sensing applications. The materials investigated here can be readily integrated into teaching, education, and outreach. TECHNICAL:Polymer semiconductors are promising for flexible electronics. However, their charge carrier mobilities are limited by the highly disordered thin film morphology and trap-dominated charge transport. Thus, it remains a grand challenge to reduce the disorder and realize the full potential of conjugated polymers for charge transport. The goal of this project is to explore a method for epitaxial growth of polymer semiconductor single crystals with two-dimensional metal halide perovskite (MHP) single crystals as interacting substrates. If successful, it will allow direct measurement of intrinsic intra- and interchain charge transport in polymer semiconductors. With less defects as traps, it may be possible to observe unprecedented charge transport. Polymer semiconductors will be prepared to systematically investigate structure property relationships for single crystalline structure formation and charge transport. Various types of two-dimensional perovskite single crystals will be used as templates to guide the assembly of organic semiconducting oligomers and polymers. This work will provide fundamental insights on conjugated polymer heteroepitaxial crystal growth. The techniques investigated here may be further developed in the future for larger-scale assembly and for systematic investigation of the structure-property relationship for charge transport in polymer semiconductors. Breaking the disorder-dominated charge transport limit of conjugated polymers may potentially bring the field to a new level and opens new applications previously not possible for various optoelectronic and sensing applications. The materials investigated here can be readily integrated into teaching, education, and outreach. .This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.