Nanoparticle/Metal-Organic Inks for CdZnTe

描述（由申请人提供）：这个SBIR一期项目解决了用于平板x射线图像探测器的CdZnTe电子材料的低温，大面积沉积路线的需求。根据研究计划，一种新的油墨成分将被配制出来，以允许CdZnTe材料在低于300℃的温度下生长。该工艺将使用含有CdZnTe纳米颗粒的混合墨水，并在非水溶剂中混合活性分散剂。反应性分散剂是一种金属有机分子，在室温下会与CdZnTe纳米颗粒强烈配合形成悬浮液。在喷雾沉积过程中，反应分散剂在较低温度下热转化为CdZnTe及其副产物。如果高质量的CdZnTe材料可以根据低温（即<300°C）工艺以这种方式沉积，则该方法直接适用于非晶硅（a- si）薄膜晶体管（TFT）阵列。耦合CdZnTe光导体与a- si TFT将导致形成平板x射线图像探测器。这种探测器可以实现实时交互式x射线成像。

DESCRIPTION (provided by applicant): This SBIR Phase I project addresses the need for low-temperature, large-area deposition routes to CdZnTe electronic materials for use in flat panel x-ray image detectors. According to the research plan, a novel ink composition will be formulated to allow growth of CdZnTe materials at temperatures less than 300 ¿C.The process will utilize a hybrid ink containing CdZnTe nanoparticles mixed with a reactive dispersant in a non-aqueous solvent. The reactive dispersant, a metal-organic molecule, will strongly coordinate to CdZnTe nanoparticles to form a suspension at ambient temperatures. During spray deposition, this reactive dispersant will thermally transform into CdZnTe and byproducts at relatively low-temperature. If high-quality CdZnTe materials can be deposited in such a fashion according to a low-temperature (i.e., <300 ¿C) process, the approach is directly amenable to application on amorphous silicon (a-Si) thin film transistor (TFT) arrays. Coupling a CdZnTe photoconductor with an a-Si TFT would result in the formation of a flat panel x-ray image detector. Such detectors could enable real-time interactive x-ray imaging.