Optimized Spatial Correlations for Broadband Light Trapping Nanopatterns in High Efficiency Ultrathin Film a-Si:H Solar Cells
Optimized Spatial Correlations for Broadband Light Trapping Nanopatterns in High Efficiency Ultrathin Film a-Si:H Solar Cells
复制标题
DOI：
10.1021/nl202226r
复制
发表时间：
2011-10-01
期刊：
影响因子：
10.8
通讯作者：
Polman, Albert
中科院分区：
文献类型：
--
作者：
Ferry, Vivian E.;Verschuuren, Marc A.;Polman, Albert
纳米光子结构由于能够在纳米尺度上管理和引导光吸收而在太阳能电池中捕获光而引起了人们的关注。虽然随机织构和纳米光子结构都已被研究过，但光电流与随机表面或设计表面的空间相关性之间的关系尚不清楚。在这里，我们系统地设计了基于功率谱密度的纳米结构的伪随机阵列，并将空间频率与测量和模拟的光电流进行了关联。集成单元设计由图案化等离子体背反射器和纳米结构半导体顶部界面组成，可提供宽带和各向同性的光电流增强。
Nanophotonic structures have attracted attention for light trapping in solar cells with the potential to manage and direct light absorption on the nanoscale. While both randomly textured and nanophotonic structures have been investigated, the relationship between photocurrent and the spatial correlations of random or designed surfaces has been unclear. Here we systematically design pseudorandom arrays of nanostructures based on their power spectral density, and correlate the spatial frequencies with measured and simulated photocurrent. The integrated cell design consists of a patterned plasmonic back reflector and a nanostructured semiconductor top interface, which gives broadband and isotropic photo current enhancement.