CAREER: Morphology Control to Build 3D Magnetic Nanostructures and Tune Organic Solar Cells

技术：这个职业奖的科学目标是通过四个相互关联的材料科学研究任务来促进对有机半导体的基本理解。第一个任务着重于有机材料的生长过程和粒度分布的作用，它们对有机材料的电子和光学性质起着至关重要的作用。采用从无机薄膜研究中采用的方法对其形貌进行了量化。第二个任务是通过制造有机超晶格(相干多层膜)来降低维度，其中界面性质占主导地位。金属的类似结构导致了巨磁电阻的发现和数据存储革命。PI计划将阻抗谱和随温度变化的测量相结合，以深入了解有机超晶格的电荷传输机制。在与化学家的合作下，PI将设计具有铁磁性的纳米构建块，可以根据需要进行调整。由此引入了磁性定制一维铁磁链的概念。第四项任务涉及有机太阳能电池的能量转换效率问题。最近，n型和p型半导体的混合被发现可以显著提高有机光伏电池的性能。在一个新的概念中，PI寻求建立基于多孔氧化铝模板的纳米柱，预计将提高效率，并提供额外的结构控制和优化设计的潜力。非技术性：该项目解决具有高度技术相关性的材料科学主题领域的基础研究问题。有机半导体在各种电子和光子应用以及潜在的巨大社会影响方面都很有价值。PI计划在加州州立大学长滩分校建立一个研究和教学实验室，为城市、种族和文化多样化的学生社区服务。这一职业奖项具有多方面的教育影响。将有机半导体纳入课程，为进入迅速扩大的有机半导体市场的学生提供了独特和必要的培训。在K-12科学学习中心增加演示有助于传达纳米技术和有机半导体的相关性。

Technical: The scientific goal of this CAREER award is to advance the fundamental understanding of organic semiconductors through four interrelated materials science research tasks. The first task focuses on the role of the growth process and grain size distribution, which play a crucial role for the electronic and optical properties of organic materials. The morphology is quantified using methodologies adapted from inorganic thin film studies. The second task is based on a reduction in dimensionality through the fabrication of organic superlattices (coherent multilayers), in which interface properties dominate. Similar structures for metals resulted in the discovery of giant magneto-resistance and the data storage revolution. The PI plans to combine impedance spectroscopy and temperature-dependent measurements to gain insight into the charge transport mechanism of organic superlattices. In collaboration with chemists, the PI will engineer nano-building blocks with ferromagnetic properties that can be tuned as needed. A concept of magnetically tailored one-dimensional ferromagnetic chains is thereby introduced. The fourth task addresses the issue of energy conversion efficiency in organic solar cells. Recently, blends of n- and p-type semiconductors were discovered to significantly increase the performance of organic photovoltaic cells. In a new concept, the PI seeks to build nano-columns based on porous alumina templates that are expected to boost the efficiency and grant additional structural control and potential for optimized design.Non-technical: The project addresses basic research issues in a topical area of materials science with high technological relevance. Organic semiconductors are valuable for various electronic and photonic applications and potentially large societal impacts. The PI plans to establish a research and teaching laboratory at the California State University, Long Beach, which serves the urban, ethnically and culturally diverse student community. This CAREER award has multiple faceted education impacts. The inclusion of organic semiconductors in the curriculum provides unique and necessary training to students entering a rapidly expanding market for organic semiconductors. Addition of demonstrations to the K-12 Science Learning Center helps convey the relevance of nanotechnology and organic semiconductors.