纳米硅中多重激子产生的统计模型研究

项目名称： 纳米硅中多重激子产生的统计模型研究

项目编号： No.11464016

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 苏未安

作者单位： 江西理工大学

项目金额： 50万元

中文摘要： 量子剪裁效应和多重激子效应都是在半导体纳米体系中因吸收一个光子而产生多个电子－空穴对的物理过程，不仅具有基础理论研究意义，而且在新型太阳电池及高性能的光电子器件上具有潜在的应用价值。本项目提出对纳米硅体系中量子剪裁效应和多重激子效应的理论基础研究。根据量子剪裁效应的物理机制和激子产生的统计方法，建立适用于研究量子剪裁效应的统计理论模型；借助理论分析技术和数值计算手段，通过对比研究，透彻分析这两种产生多重电子－空穴对的物理现象之间的差别与联系；在量子点表面理论分析的基础上，适当改进物理模型，详细地分析纳米颗粒表面情况对量子剪裁和多重激子效应的影响。本项目的深入研究将为新型光电子器件的研发注入新活力，加快半导体光电子科学与工程技术的发展。

中文关键词： 多重激子效应；量子裁剪效应；纳米硅；统计模型

英文摘要： Both quantum cutting and multiple exciton generation in semiconductor nanocrystals,a process two or mor electron-hole pairs generated by absorbing one photon, have very important significance of basic research and potential value for the development of high-efficient solar cells and high-performance optoelectronic devices.This proposal has proposed the novel fundamental research on quantum cutting and multiple exciton generation in silicon nanocrystals. On the one hand, in order to study quantum cutting, a theory statistical model has to be established according to the physical mechanisms of quantum cutting effect and the statistics theory of excitons generation. On the other hand, to clarify the relationship between quantum cutting and multiple exciton generation, a comparative studies of the theory models and their results of quantum cutting and multiple exciton generation, with theoretical analysis and numerical calculation means, has to be needed. Furthermore, the surface properties of semiconductor nanoparticles have a great influence on the generation of electron-hole pairs in semiconductor nanoparticles system. It is very important to dtailed analysis of the effect of the nanoparticles surface on quantum cutting and multiple exciton generaton with the modified theoretical theory models based on theoretical analysis of quantum dot surface. The deep through research of this proposal will hopefully introduce new vitality to the exploration of new type solar cells and high-performance optoelectronic devices and accelerate the general development of photoelectric science and engineering.

英文关键词： multiple exciton generation;quantum cutting;silicon nanocrystals;statistical model