论文标题
基于氮化硅光光谱频谱分裂浓缩器用于NIR光收集
Silicon nitride grating based planar spectral splitting concentrator for NIR light Harvesting
论文作者
论文摘要
我们为近红外（NIR）轻能量收集应用设计了多层太阳谱分裂平面集中器。每一层都包括在玻璃基板顶部的基于氮化硅的亚波长衍射光栅，该光栅被优化，可从特定的带中从宽光谱（NIR区域的700-1400 nm）中衍射到特定带中的传入太阳辐射，以在玻璃底物内部传播的指导模式。由于亚波长度光栅而引起的陡峭衍射角会导致每层边缘的集中光，然后使用光伏电池将其转换为电能。频谱分裂平面集中器的总体NIR指导效率约为18％，功率转换效率约为11％。该设计可以可能用于构建集成的光伏应用程序。
We design a multi-layered solar spectral splitting planar concentrator for near infrared (NIR) light energy harvesting application. Each layer includes a silicon nitride based subwavelength diffraction grating on top of a glass substrate that is optimized to diffract the incoming solar radiation in a specific band from a broad spectral band (700-1400 nm in the NIR region) into guided modes propagating inside the glass substrate. The steep diffraction angle due to subwavelength grating results in concentrated light at the edge of each layer where it is then converted to electricity using a photovoltaic cell. The spectral splitting planar concentrator shows an overall NIR guiding efficiency of ~18%, and power conversion efficiency of ~11%. The design can be potentially used for building integrated photovoltaics application.
