纳米硅／氧化硅体系光致发光机制

实际研究的多孔硅几乎都是氧化程度不同的氧化多孔硅，它与另一大类硅基发光材料纳米硅镶嵌氧化硅有相似的结构和发光特徵．两者都是由大量为氧化硅所包裹的纳米硅组成，可统称为纳米硅／氧化硅体系．它是当前研究最多并被普遍认为很有希望的硅基发光材料体系．本文主要讨论纳米硅／氧化硅体系光致发光的机制，文中扼要介绍了我自己所在的研究小组近十几年来的一些相关研究工作．

MECHANISMS FOR PHOTOLUMINESCENCE FROM NANOSCALE SILICON/SILICON OXIDE SYSTEMS

Most porous silicon samples studied have been oxidized in various degrees. Oxidized porous silicon and the nanoscale silicon particles embedded oxidized silicon have similar structures and luminescence characteristics. Both of them consist of a great quantity of nanoscale silicon particles, each of which is surrounded by an oxidized silicon layer, and can be named as nanoscale silicon/oxidized silicon systems. They are the most strongly studied and very promising silicon-based luminescence materials. In this article, the photoluminescence mechanisms of the nanoscale silicon particles/oxidized silicon systems were summarized and discussed. The related research works finished by our group in Peking university were briefly introduced.