Chemistry of Luminescent Porous Silicon

发光多孔硅的化学

• 批准号: 9220367
• 负责人: Michael Sailor
• 金额: $ 32.85万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-04-01 至 1996-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220367&HistoricalAwards=false
• 关键词: Chemistry; Luminescent; Porous; Silicon

The goal of this work is to understand the origin of luminescence in porous silicon, and to explore the relationship between luminescence and surface chemistry of this material. The first goal will be achieved by testing the three current hypotheses explaining photoluminescence in porous silicon. The second goal will be achieved by observing the changes that occur in emission intensity, wavelength, and lifetimes on exposure of the materials to various chemical reagents such as Lewis acids or bases, electron, hole, or energy transfer agents, and polar or polarizable species. The mechanism of luminescence quenching of porous silicon by gas phase species will be studied. The silicon surface chemistry will by developed by tuning the quenching response for specific adsorbates. The unique ability of porous silicon to change its fluorescence color and intensity in the presence of chemical adsorbates opens up a range of possible application for gas, liquid, and biological sensors. In addition, an understanding of the fundamental photophysics of porous silicon under these conditions may lead to the development of full-color flat panel electroluminescence displays. these potential development can build on well- established silicon processing technology. The key contribution of the proposed work is that it will define the chemical and photochemical reactivity patterns of luminescent porous silicon, providing the design rules for the development of such applications.

这项工作的目的是了解多孔硅中发光的起源，并探索发光与该材料表面化学之间的关系。 第一个目标将通过测试当前的三个假设来实现，以解释多孔硅的光致发光。 第二个目标将通过观察发射强度，波长和寿命中发生的变化来实现。 将研究气相物种对多孔硅发光淬火的机理。 硅表面化学将通过调整特定吸附物的淬火响应来开发。 在化学吸附物的存在下，多孔硅改变其荧光颜色和强度的独特能力为气体，液体和生物传感器提供了一系列可能的应用。 此外，在这些条件下，对多孔硅的基本光体物理学的理解可能导致全彩色平板电致发光显示器的发展。 这些潜在的发展可以建立在良好的硅处理技术的基础上。 拟议工作的主要贡献是，它将定义发光多孔硅的化学和光化学反应性模式，从而为开发此类应用提供了设计规则。