CAREER: Nanoscale Controlled Supramolecular Light Emitting Devices by Novel Self-Assembly Techniques

9702220 Papadimitrakopoulos这个职业项目解决了有机发光二极管（LED）的基本材料科学问题。低分子量的可升华有机物，例如8-羟基喹啉金属螯合物是有利的，因为用简单的高真空蒸发可获得固有的半导体纯度水平。尽管已经设想了它们的高分子量聚合物类似物的优点，但是由于与大分子结构相关的固有杂质和缺陷，它们还没有实现。该项目的目标包括一个广泛的制造方法，有效地解决这些问题，并允许复杂的超分子结构通过一个简单的自组装方法来构建。一些具体的预期特征包括：直接化学附着到基底上，通过密集堆积和二维交联增加横向稳定性，导致稳定性增加的无针孔器件;成膜均匀性，无论起始基底的形状和尺寸如何;化学表面图案化和随后的局部生长允许以简单的、附加的、与传统的蚀刻技术相反的堆积方式。%该项目解决了具有高技术相关性的材料科学主题领域的前沿研究问题。 该研究将在基本层面上为有机光子材料和器件的重要方面提供基本的材料科学知识。 该计划的一个重要特点是强调教育，并通过在基础和技术上重要的研究领域培养学生，将研究与教育相结合。例如，化学的固有简单性和分子结构的多功能性有助于桥接广泛的科学学科，同时保持从本科生到高素质研究科学家的教育水平。在研究活动中原型设备的实际制造指导和激励年轻人进入科学和工程领域，为他们提供未来先进技术的坚实基础。***

9702220 Papadimitrakopoulos This CAREER project addresses fundamental materials science issues of organic Light Emitting Diodes (LEDs). Low molecular weight sublimable organics, such as 8-hydroxyquinoline metal chelates have been advantageous because of the inherent semiconductor purity levels attainable with simple high-vacuum evaporation. Although advantages have been envisioned for their high molecular weight polymeric analogs, they have not materialized due to intrinsic impurities and defects associated with macromolecular architecture. The objectives of this project encompass a broad fabrication methodology which effectively addresseq these issues and permits complex supramolecular structures to be constructed via a facile self-assembly approach. Some specific anticipated features include: Direct chemical attachment to the substrate, with increased lateral stability by dense packing and two dimensional crosslinking, leading to pinhole-free devices of increased stability; Film forming uniformity, regardless of shape and size of the starting substrate; Chemical surface patterning and subsequent localized growth permitting complex device fabrication in simple, additive, buildup fashion as opposed to conventional etching techniques. %%% The project addresses forefront research issues in a topical area of materials science having high technological relevance. The research will contribute basic materials science knowledge at a fundamental level to important aspects of organic photonic materials and devices, in general. An important feature of the program is the emphasis on education, and on the integration of research and education through the training of students in a fundamentally and technologically significant research area. For example, the innate simplicity of the chemistry and versatility of molecular architecture help bridge a broad array of scientific disciplines, while maintaining accessibility to educational levels from undergraduate students to highly qualified research scientists . The actual fabrication of proto-type devices in the research activity directs and motivates young minds into science and engineering, providing them a strong foundation in the advanced technologies of the future. ***