Mie resonances of dielectric nanostructures for light trapping and spectral conversion applications in photovoltaics

用于光伏发电中光捕获和光谱转换应用的介电纳米结构的米氏共振

• 批准号: 299229277
• 负责人: Dr. Alexander Sprafke
• 金额: --
• 依托单位: School of Photovoltaic and Renewable Energy Engineering
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/299229277?language=en
• 关键词: Mie; resonances; dielectric; nanostructures; light

In this project, we aim to exploit the optical response of dielectric nanostructures to enhance solar cells. The nanostructures, e.g. high-refractive index dielectric nanoparticles (NPs), shall have characteristic feature sizes of tens to a few hundred nanometers. With these dimensions, the structures operate in the Mie scattering regime in which geometrical resonances dominate the optical response of the NPs. Mie resonances in these particles lead to resonantly enhanced light scattering or increased electromagnetic near-field. In this regard, they seem similar to metallic NPs. In comparison to metallic, i.e. plasmonic, NPs the main advantage of dielectric NPs is their lack of (or at least orders of magnitude smaller) intrinsic absorption. This makes dielectric NPs attractive for applications in which losses need to be kept as low as possible, e.g. in solar cells. Here, we wish to explore two aspects of Mie resonances in dielectric NPs: Light scattering into the far-field for an efficient light path enhancement in thin solar cells as well as their suitability as efficient receiving and emitting nanoantennas for frequency conversion. Both aspects shall be investigated with the aim to enhance solar cells. In this regard, working at the School of Photovoltaics and Renewable Energy Engineering of the University of New South Wales (UNSW) is supposedly very fruitful. UNSW has a strong history in photovoltaics and its researches are renowned experts in this field, both experimentally as well as theoretically.

在这个项目中，我们的目标是利用介电纳米结构的光学响应来增强太阳能电池。纳米结构，例如高折射率介电纳米颗粒（NP），应具有数十至数百纳米的特征尺寸。在这些尺寸下，结构在米氏散射区域中操作，其中几何共振主导NP的光学响应。这些粒子中的米氏共振导致共振增强的光散射或增加的电磁近场。在这方面，它们似乎类似于金属NP。与金属（即等离子体）NP相比，电介质NP的主要优点是它们缺乏（或至少小几个数量级）本征吸收。这使得电介质NP对于需要保持尽可能低的损耗的应用（例如在太阳能电池中）具有吸引力。在这里，我们希望探索介电纳米颗粒中米氏共振的两个方面：光散射到远场，以增强薄太阳能电池中的有效光路，以及它们作为频率转换的有效接收和发射纳米天线的适用性。这两个方面都应进行研究，以提高太阳能电池的性能。在这方面，在新南威尔士大学（UNSW）的光化学和可再生能源工程学院工作应该是非常富有成效的。新南威尔士大学在光化学方面有着悠久的历史，其研究人员是该领域的知名专家，无论是实验还是理论。