NER: Nanoscale Organic Spintronics

本研究的目的是研究基于n共轭聚合物的纳米级有机自旋电子学和有机光自旋电子学。利用磁定向铁磁触点注入自旋极化电子和空穴到自组装的异质层有机纳米线中，将有可能抑制非发射的三重态电子空穴复合，促进单线态电子空穴复合。这将提高量子效率，并产生明亮的有机发光纳米二极管。我们最近的工作证明了n共轭聚合物的自旋弛豫时间异常长。这为基于自旋阀的纳米线有机磁性随机存储器的开发提供了前景。由于存储器器件将是密度为1011 cm-2的纳米线，因此极高密度存储器是可行的。这项工作的智力价值在于阐明了有机中的自旋输运，提供了对自旋弛豫模式的批判性理解，并建立了实现纳米级有机光自旋电子学所需的框架。广泛的影响将是可能实现自旋增强的明亮有机发光二极管。这些廉价的光源将与柔性衬底兼容，并将通过简单的烧杯电化学产生。预计对这些产品有很大的需求。另一个成果将是基于有机的纳米线磁性随机存取存储器元件，它是非易失性的。在这个项目中训练的研究生将是新兴市场的宝贵资产。

The objective of this research is to investigate nanoscale organic spintronics and organic opto-spintronics based on n-conjugated polymers. By injecting spin polarized electrons and holes into self assembled heterolayered organic nanowires using magnetically aligned ferromagnetic contacts, it will be possible to suppress the non-emissive triplet electron hole recombination and promote the singlet electron hole recombination. This will increase quantum efficiency and produce bright organic light emitting nanodiodes. Our recent work has demonstrated exceptionally long spin relaxation times in n-conjugated polymers. This is promising for the development of nanowire based organic magnetic random access memory based on spin valves. Since the memory devices will be nanowires with a density 1011 cm-2, extremely high density memory is feasible.The intellectual merit of this work consists of elucidating spin transport in organics, providing critical understanding of spin relaxation modes, and building the framework necessary for the realization of nanoscale organic opto-spintronics.The broad impact will be the possible realization of spin-enhanced bright organic light emitting diodes. These inexpensive light sources will be compatible with flexible substrates and will be produced by simple beaker electrochemistry. It is anticipated that there is a significant demand for these products. An additional outcome will be organic based nanowire magnetic random access memory elements which are non-volatile. Graduate students trained in this program will be valuable assets in the emerging marketplace.