金属银催化腐蚀硅纳米线反应电荷与形貌参数的量化规律研究

Silicon nanowires fabricated by metal assisted etching have shown the potential applications in the field of solar cells, thermoelectric devices and lithium ion battery. It is aim to reveal quantitative law of reaction charge and morphology parameters by silver assisted etching for silicon nanowires in this project. The applicant propose that the real-time reactive current can be recorded by the method of macroscopic galvanic cell-driven metal assisted etching for silicon nanowires, then reaction charge is obtained by accumulating the real-time reactive current over time, and study on quantitative law of the corresponding morphology parameters. The research include the quantitative law of reaction charge and morphology parameters under free field condition and no field condition (Uniform.external electric field and light). Through the studies in the project, the mechanism of metal assisted etching for silicon nanowires will be further explored. The results in this project will provide a theoretical basis for improving and promoting the development and application of metal assisted etching method.

基于金属催化腐蚀法制备的硅纳米线已在太阳能电池、热电器件、锂离子电池等领域展现了潜在的应用前景。本项目以揭示金属银催化腐蚀硅纳米线的反应电荷与形貌参数的量化规律为目的开展研究工作。申请人提出利用宏观原电池驱动的方法获得硅纳米线形成过程中的实时反应电流，再对其进行时间累积，从而获得参与反应的电荷，研究其与相应的形貌参数的量化规律。研究内容包括无外场条件下和有外场条件下（分别为外加均匀电场和光照）的反应电荷和形貌参数的量化规律研究。通过本项目的研究，可以进一步探明金属催化腐蚀法制备硅纳米线的机理，力争在金属催化腐蚀技术的原理上有所突破与创新，为改进和促进金属催化腐蚀法的开发和应用提供理论基础。