Electrochemical Processing and Synthesis of Light Emitting Porous Silicon Structures

最近发现，多孔硅结构在室温下表现出很强的可见光致发光。本课程主要研究多孔硅的结构-性能关系。多孔硅结构是通过化学腐蚀过程形成的，然而，关于腐蚀参数如何控制多孔硅结构的形貌和所产生的发光特性，人们知之甚少。将使用蚀刻过程的计算机模拟来了解作为工艺参数的函数可获得的多孔性结构的范围。类似范围的多孔结构将在实验中得到检验。该计划的最终目标是开发将微结构与工艺参数和发光性能联系起来的结构相图。发光多孔硅将是其他光学材料的廉价替代品，并允许与硅基电子设备集成。该项目涉及与多孔硅结构制造相关的材料加工方面，并努力描述和理解结构和光学性能之间的关系。该项目包括多孔硅结构的合成、结构/性能关系的实验分析和生长过程的理论建模。

It has been discovered recently that porous silicon structures exhibit strong visible photoluminescence at room temperature. This program focuses on the structure-property relationships of porous silicon. Porous silicon structures are formed by a chemical etching process; however, very little is known about how the etching parameters control the morphology of the porous structures and the resultant light emitting characteristics. Computer simulations of the etching process will be used to develop an understanding of the range of porous structures attainable as a function of processing parameters. A similar range of porous structures will be examined experimentally. The ultimate aim of the program is the development of structural phase diagrams relating microstructure to processing parameters and light emitting properties. %%% Light emitting porous silicon would be an inexpensive alternative to other optical materials and allow for integration with silicon- based electronics. This program addresses materials processing aspects relevant to the fabrication of porous silicon structures, and strives to characterize and understand the relationships between structure and optical properties. The program includes the synthesis of porous silicon structures, experimental analysis of structure/property relationships and theoretical modeling of the growth processes.