Drastically increased absorption in vertical semiconductor nanowire arrays: A non-absorbing dielectric shell makes the difference
文献类型：期刊论文
| 作者 | Anttu, N ; Namazi, KL ; Wu, PM ; Yang, PF ; Xu, HX ; Xu, HQ ; Hakanson, U |
| 刊名 | NANO RESEARCH
 |
| 出版日期 | 2012 |
| 卷号 | 5期号:12页码:863 |
| 关键词 | III-V NANOWIRES PHOTOVOLTAIC APPLICATIONS SOLAR-CELLS CORE-SHELL SILICON NANOWIRES LIGHT HETEROSTRUCTURES GROWTH |
| ISSN号 | 1998-0124 |
| 通讯作者 | Anttu, N: Lund Univ NmC LU, Nanometer Struct Consortium, Div Solid State Phys, POB 118, S-22100 Lund, Sweden. |
| 中文摘要 | Enhanced absorption of especially long wavelength light is needed to enable the full potential of semiconductor nanowire (NW) arrays for optoelectronic applications. We show both experimentally and theoretically that a transparent dielectric shell (Al2O3 coating) can drastically improve the absorption of light in InAs NW arrays. With an appropriate thickness of the Al2O3 shell, we achieve four times stronger absorption in the NWs compared to uncoated NWs and twice as good absorption as when the dielectric completely fills the space between the NWs. We provide detailed theoretical analysis from a combination of full electrodynamic modeling and intuitive electrostatic approximations. This reveals how the incident light penetrates better into the absorbing NW core with increasing thickness of the dielectric shell until a resonant shell thickness is reached. We provide a simple description of how to reach this strongly absorbing resonance condition, making our results easy to apply for a broad wavelength range and a multifold of semiconductor and dielectric coating material combinations. |
| 收录类别 | SCI |
| 资助信息 | Swedish Research Council (VR); Swedish Foundation for Strategic Research (SSF); Nanometer Structure Consortium at Lund University (nmC@LU); European Union (EU) program Architectures, Materials, and One-dimensional Nanowires for Photovoltaics-Research and Applications (AMON-RA) [214814]; Nordic Innovation program NANORDSUN; Knut and Alice Wallenberg Foundation; E.ON AG, E.ON International Research Initiative; Ministry of Science and Technology of China [2012CB932703, 2012CB932700]; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36230]  |
| 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 | Anttu, N,Namazi, KL,Wu, PM,et al. Drastically increased absorption in vertical semiconductor nanowire arrays: A non-absorbing dielectric shell makes the difference[J]. NANO RESEARCH,2012,5(12):863. |
| APA | Anttu, N.,Namazi, KL.,Wu, PM.,Yang, PF.,Xu, HX.,...&Hakanson, U.(2012).Drastically increased absorption in vertical semiconductor nanowire arrays: A non-absorbing dielectric shell makes the difference.NANO RESEARCH,5(12),863. |
| MLA | Anttu, N,et al."Drastically increased absorption in vertical semiconductor nanowire arrays: A non-absorbing dielectric shell makes the difference".NANO RESEARCH 5.12(2012):863. |
入库方式： OAI收割
来源：物理研究所
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