Exciton states and optical spectra in CdSe nanocrystallite quantum dots
文献类型：期刊论文
| 作者 | Li JB
|
| 刊名 | physical review b
 |
| 出版日期 | 2000 |
| 卷号 | 61期号:23页码:15880-15886 |
| 关键词 | ELECTRONIC-STRUCTURE SEMICONDUCTOR CLUSTERS SIZE DEPENDENCE ENERGY-LEVELS CRYSTALLITES ASSIGNMENT WURTZITE SPHERES BANDS DARK |
| ISSN号 | 0163-1829 |
| 通讯作者 | li jb,chinese acad sci,inst semicond,natl lab superlattices & microstruct,pob 912,beijing 100083,peoples r china. |
| 中文摘要 | by using the hole effective-mass hamiltonian for semiconductors with the wurtzite structure, we have studied the exciton states and optical spectra in cdse nanocrystallite quantum dots. the intrinsic asymmetry of the hexagonal lattice structure and the effect of spin-orbital coupling (soc) on the hole states are investigated. it is found that the strong soc limit is a good approximation for hole states. the selection rules and oscillator strengths for optical transitions between the conduction- and valence-band states are obtained. the coulomb interaction of exciton states is also taken into account. in order to identify the exciton states, we use the approximation of eliminating the coupling of gamma(6)(x, y) with gamma(1)(z) states. the results are found to account for most of the important features of the experimental photoluminescence excitation spectra of norris ct nl. however, if the interaction between gamma(6)(x, y) and gamma(1)(z) states is ignored, the optically passive p-x state cannot become the ground hole state for small cdse quantum dots of radius less than 30 angstrom. it is suggested that the intrinsic asymmetry of the hexagonal lattice structure and the coupling of gamma(6)(x,y) with gamma(1)(z) states are important for understanding the "dark exciton" effect. |
| 学科主题 | 半导体物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2010-08-12 |
| 源URL | [http://ir.semi.ac.cn/handle/172111/12530]  |
| 专题 | 半导体研究所_中国科学院半导体研究所（2009年前） |
| 推荐引用方式 GB/T 7714 | Li JB. Exciton states and optical spectra in CdSe nanocrystallite quantum dots[J]. physical review b,2000,61(23):15880-15886. |
| APA | Li JB.(2000).Exciton states and optical spectra in CdSe nanocrystallite quantum dots.physical review b,61(23),15880-15886. |
| MLA | Li JB."Exciton states and optical spectra in CdSe nanocrystallite quantum dots".physical review b 61.23(2000):15880-15886. |
入库方式： OAI收割
来源：半导体研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。