Broadband solar distributed Bragg reflector design using numerical optimization
Broadband solar distributed Bragg reflector design using numerical optimization
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DOI：
10.1016/j.solener.2021.04.045
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发表时间：
2021-06
期刊：
影响因子：
6.7
通讯作者：
Hansol Kim;Mine Kaya;S. Hajimirza
中科院分区：
文献类型：
--
作者：
Hansol Kim;Mine Kaya;S. Hajimirza
本文通过优化SiO2/TiO 2多对布拉格反射镜的结构，获得了可见光到近红外波段的宽波段、宽角度的高太阳反射率。为了控制BR对中的折射率对比，还允许改变SiO2的孔隙率（在所有层中相同）。我们研究了对的数量和孔隙率和结构的整体性能之间的权衡。作为优化的结果，我们证明了一个15对结构可以产生的平均反射率的两倍，四分之一波长的堆栈规则设计的外星辐照度。
In this paper, we optimize the structure of the multi-paired SiO2/TiO2Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO2(same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.