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受控真空生长Vladimir Bulovice麻省理工学院$239,301ABSTRACT该奖项支持开发一种多功能材料生长系统，用于控制有机、无机和混合多层结构的沉积。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(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有机/无机混合薄膜的物理和气相沉积方法，包括一个低压RF/DC溅射室和一个蒸发生长室。完成的真空系统将能够以受控的方式逐层沉积分子有机物、聚合物、金属、金属氧化物、无机纳米点和胶体。现场荫罩系统将能够在真空环境中制造复杂的图案化结构，而集成的充满氮气的干燥手套箱将有助于处理、测量和包装易与大气中的氧气和水蒸气反应的有机薄膜样品。完成的样品将在分析室中通过连接到X-Y-Z机械手上的电子探头接触来进行现场测试。腔体上的光学端口允许对设备进行可伸缩的观察，并便于对被探测样品进行光学激发。集成的AFM/STM小室将促进原位原子尺度显微镜，这是评估杂化材料性能所必需的。本项目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子器件中。由此得到的纳米级有机/无机材料混合结构有望具有独特的性质并超过纯有机固体的功能能力，从而使诸如光电探测器、LED、激光、调制器和波导等器件的开发具有与当前技术水平相比更好的性能。有源有机/无机混合光电子学的发展将导致对杂化材料中激子能量传递、光生和载流子输运等物理过程的研究。这些基础研究将对杂化固体在光电子器件中的实际应用产生直接影响，影响杂化薄膜、异质结、多层膜、量子阱以及用于新一代高科技器件的纳米图案化有机/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.