MRI: Development of Controlled Vacuum Growth of Hybrid Organic/Inorganic Structures and Devices

CTS-0116451 MRI：有机/无机混合结构和器件的可控真空生长麻省理工学院Vladimir Bulovic $239，301摘要该奖项支持开发一种多功能材料生长系统，用于有机、无机和混合多层结构的可控沉积。 这似乎将是有史以来第一个能够无溶剂真空沉积无机纳米晶体（如CdSe和CdTe纳米点）薄膜的系统，该系统还将适应聚合物，胶体和分子有机材料的无溶剂沉积和共沉积。 完成的生长系统将集成一种新的方法，用于混合有机/无机薄膜的物理和气相沉积与低压RF/DC溅射室和蒸发生长室。 完成的真空系统将能够以受控的逐层方式沉积分子有机物、聚合物、金属、金属氧化物、无机纳米点和胶体。 一个原位荫罩系统将使复杂的图案化结构的真空环境内的制造，而集成的氮气填充，干燥手套箱将有助于处理，测量和包装的有机薄膜样品，容易与大气中的氧气和水蒸气反应。 完成的样品将在分析室中通过与连接到X-Y-Z操纵器的电探针接触进行原位测试。 腔室上的光学端口允许设备的望远镜视图，并促进探测样品的光学激发。 集成的AFM/STM腔室将有助于原位原子尺度显微镜评估杂化材料的性能。本计划的研究目标是将无机纳米点的物理和功能特性集成到有源光电器件中。 由此产生的纳米级混合有机/无机材料结构有望具有独特的性能，并超过纯有机固体的功能能力，从而能够开发诸如光电探测器、LED、激光器、调制器等器件，以及与现有技术相比具有优良上级性能的波导。无机光电子学将导致混合材料中物理过程的研究，如激子能量转移、光生作用和电荷载流子传输。 这些基础研究将对光电器件中混合固体的实际应用产生直接影响，影响新一代高技术器件的混合薄膜、异质结、多层膜、量子威尔斯和纳米图案化有机/无机材料的发展。

CTS-0116451MRI: Controlled Vacuum Growth of Hybrid Organic/Inorganic Structures and DevicesVladimir BulovicMassachusetts Institute of Technology$239,301ABSTRACTThis award supports development of a versatile materials-growth system for controlled deposition of organic, inorganic, and hybrid multilayer structures. It appears that this will be the first system ever built capable of solvent-free, vacuum deposition of thin films of inorganic nanocrystals (such as CdSe and CdTe nanodots) that will also accommodate solvent-free deposition and co-deposition of polymers, colloids, and molecular organic materials. The completed growth system will integrate a novel method for physical and vapor phase deposition of hybrid organic/inorganic thin-films with a low-pressure RF/DC sputtering chamber and an evaporative growth chamber. The completed vacuum system will be capable of depositing molecular organics, polymers, metals, metal oxides, inorganic nanodots, and colloids in a controlled layer-by-layer fashion. An in-situ shadow masking system will enable fabrication of complex patterned structures inside a vacuum environment, while the integrated N2-filled, dry glove box will facilitate handling, measuring, and packaging of organic thin film samples that are susceptible to reactions with atmospheric oxygen and water vapor. Completed samples will be tested in-situ in the analysis chamber by contacting them with an electrical probe attached to an X-Y-Z manipulator. Optical ports on the chamber allow for a telescopic view of the devices and facilitate optical excitation of probed samples. The integrated AFM/STM chamber will facilitate in-situ atomic scale microscopy necessary for evaluating properties of hybrid materials.The research goal in this program is to integrate physical and functional properties of inorganic nanodots into active optoelectronic devices. The resulting nano-scale hybrid organic/inorganic-materials structures are expected to have unique properties and to exceed functional capability of purely organic solids, enabling the development of devices such as photodetectors, LEDs, lasers, modulators, and waveguides with superior properties compared to the present state of the art. Development of active hybrid organic/inorganic optoelectronics will lead to investigations of physical processes in hybrid materials such as exciton energy transfer, photogeneration, and charged-carrier transport. These fundamental studies will have a direct impact on practical applications of hybrid solids in optoelectronic devices, influencing development of hybrid thin films, heterojunctions, multilayers, quantum wells, and nano-patterned organic/inorganic materials for a new generation of high-technology devices.