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

EAGER：共轭聚合物中超晶格诱导的多晶和单晶结构

• 批准号: 2203318
• 负责人: Zhenan Bao
• 金额: $ 30万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2203318&HistoricalAwards=false
• 关键词: EAGER; Superlattice; induced; polycrystalline; single

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.

非技术：聚合物半导体在柔性电子产品方面很有前景。然而，它们的载流子迁移率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，减少无序并充分发挥共轭聚合物电荷传输的潜力仍然是一个巨大的挑战。该项目的目标是探索一种以二维金属卤化物钙钛矿（MHP）单晶作为相互作用基底的聚合物半导体单晶的外延生长方法。如果成功，它将允许直接测量聚合物半导体中固有的链内和链间电荷传输。由于陷阱缺陷较少，就有可能观察到前所未有的电荷传输。这项工作将为共轭聚合物异质外延晶体生长提供基本见解。这里研究的技术将来可能会进一步发展，用于更大规模的组装以及对聚合物半导体中电荷传输的结构-性能关系的系统研究。打破共轭聚合物的无序主导的电荷传输限制可能会将该领域提升到一个新的水平，并开辟以前不可能用于各种光电和传感应用的新应用。这里研究的材料可以很容易地融入到教学、教育和推广中。技术：聚合物半导体在柔性电子产品方面很有前景。然而，它们的载流子迁移率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，减少无序并充分发挥共轭聚合物电荷传输的潜力仍然是一个巨大的挑战。该项目的目标是探索一种以二维金属卤化物钙钛矿（MHP）单晶作为相互作用基底的聚合物半导体单晶的外延生长方法。如果成功，它将允许直接测量聚合物半导体中固有的链内和链间电荷传输。由于陷阱缺陷较少，就有可能观察到前所未有的电荷传输。将制备聚合物半导体来系统地研究单晶结构形成和电荷传输的结构特性关系。各种类型的二维钙钛矿单晶将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生长提供基本见解。这里研究的技术将来可能会进一步发展，用于更大规模的组装以及对聚合物半导体中电荷传输的结构-性能关系的系统研究。打破共轭聚合物的无序主导的电荷传输限制可能会将该领域提升到一个新的水平，并开辟以前不可能用于各种光电和传感应用的新应用。这里研究的材料可以很容易地融入到教学、教育和推广中。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。