Photonic Crystal Geometry for Organic Solar Cells
Photonic Crystal Geometry for Organic Solar Cells
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DOI：
10.1021/nl901232p
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发表时间：
2009-07-01
期刊：
影响因子：
10.8
通讯作者：
Samulski, Edward T.
中科院分区：
文献类型：
--
作者：
Ko, Doo-Hyun;Tumbleston, John R.;Samulski, Edward T.
我们报道了在光敏体异质结层中具有光子晶体纳米结构的有机太阳能电池，这种形貌在太阳光谱的特定区域显示出3倍的吸收增强，部分原因是通过多次激发共振。光子晶体几何结构是使用一种称为PRINT的材料不可知工艺制造的，其中高度有序的纳米级特征阵列很容易在一个单一的加工步骤中在宽的区域（类似于4厘米(2)）上制造，这是可扩展的。我们展示了大约70%的效率提高，这不仅来自于更大的吸收，还来自于电的增强。该方法一般适用于有机太阳能电池，我们的手稿中报告的实验结果证实了理论期望。
We report organic solar cells with a photonic crystal nanostructure embossed in the photoactive bulk heterojunction layer, a topography that exhibits a 3-fold enhancement of the absorption in specific regions of the solar spectrum in part through multiple excitation resonances. The photonic crystal geometry is fabricated using a materials-agnostic process called PRINT wherein highly ordered arrays of nanoscale features are readily made in a single processing step over wide areas (similar to 4 cm(2)) that is scalable. We show efficiency improvements of similar to 70% that result not only from greater absorption, but also from electrical enhancements. The methodology is generally applicable to organic solar cells and the experimental findings reported in our manuscript corroborate theoretical expectations.