Effect of symmetry breaking on the optical absorption of semiconductor nanoparticles
文献类型：期刊论文
| 作者 | Gali, A ; Kaxiras, E ; Zimanyi, GT ; Meng, S |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:3 |
| 关键词 | MULTIPLE EXCITON GENERATION PBSE QUANTUM DOTS EFFICIENCY CARRIER MULTIPLICATION CDSE NANOCRYSTALS ELECTRONIC-STRUCTURE COLLOIDAL PBSE RODS CONFINEMENT FILMS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Gali, A: Hungarian Acad Sci, Res Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary. |
| 中文摘要 | The shape of semiconductor nanoparticles (NPs) can have an important influence on their optical absorption spectra with enhanced absorption resulting from breaking their symmetries. To illustrate this effect, we present broad energy optical excitation spectra of similar to 2 nm Si and PbSe nanoparticles, obtained from extensive time-dependent density functional theory calculations. We considered both highly symmetric spherical shapes and low-symmetry rodlike and disklike shapes. The low-symmetry shapes exhibit an increase in absorption at low and relatively high energies compared to the absorption of spherical NPs of similar volume, independent of their chemical compositions and surface structures. Our results elucidate the mechanism of enhanced multiexciton generation in semiconductor NPs, which is important in the quest to improve their photovoltaic applications. |
| 收录类别 | SCI |
| 资助信息 | Hungarian OTKA [K-67886]; Hungarian Academy of Sciences; NHDP [TAMOP-4.2.1/B-09/1/KMR-2010-0002]; CAS and NSFC [11074287]; NSF-SOLAR [1035468] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36579]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Gali, A,Kaxiras, E,Zimanyi, GT,et al. Effect of symmetry breaking on the optical absorption of semiconductor nanoparticles[J]. PHYSICAL REVIEW B,2011,84(3). |
| APA | Gali, A,Kaxiras, E,Zimanyi, GT,&Meng, S.(2011).Effect of symmetry breaking on the optical absorption of semiconductor nanoparticles.PHYSICAL REVIEW B,84(3). |
| MLA | Gali, A,et al."Effect of symmetry breaking on the optical absorption of semiconductor nanoparticles".PHYSICAL REVIEW B 84.3(2011). |
入库方式： OAI收割
来源：物理研究所
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