Broadband Absorption Enhancement in Solar Cells with an Atomically Thin Active Layer
Broadband Absorption Enhancement in Solar Cells with an Atomically Thin Active Layer
复制标题
DOI：
10.1021/acsphotonics.5b00510
复制
发表时间：
2016-04-01
期刊：
影响因子：
7
通讯作者：
Fan, Shanhui
中科院分区：
文献类型：
--
作者：
Piper, Jessica R.;Fan, Shanhui
我们数值模拟了在可见光中单层二硫化钼的宽带吸收增强放置在光子晶体板，由一个完美的电导体镜支持。吸收增强是由于二硫化钼与光子晶体板的导频共振之间的相互作用引起的。通过考虑光捕获理论和参数的设计参数的研究，它表明，最佳的光子晶体板具有一个光栅周期，是亚波长的大部分的频率区域的兴趣，有大的空气孔，是薄的。最佳设计的特点是在垂直入射下，在可见光区的平均吸收率为51%，高于MoS 2的带隙（400-690 nm），厚度小于100 nm。我们还评论的角度响应的最佳设备。
We numerically demonstrate broadband absorption enhancement in the visible in monolayer MoS2 placed on a photonic crystal slab, backed by a perfect electric conductor mirror. The absorption enhancement arises from interaction between the MoS2 and the guided resonances of the photonic crystal slab. Through consideration of light trapping theory and parametric studies of the design parameters, it is shown that the optimal photonic crystal slab has a grating period that is subwavelength to most of the frequency region of interest, has large air holes, and is thin. The optimal design features an average absorption of 51% at normal incidence in the visible above the band gap of MoS2 (400-690 nm) and is less than 100 nm thick. We also comment on the angular response of the optimal device.