We present a methodology for probing light-matter interactions in prototype photovoltaic devices consisting of an organic semiconductor active layer with a semitransparent metal electrical contact exhibiting surface plasmon-based enhanced optical transmission. We achieve high-spectral irradiance in a spot size of less than 100 μm using a high-brightness laser-driven light source and appropriate coupling optics. Spatially resolved Fourier transform photocurrent spectroscopy in the visible and near-infrared spectral regions allows us to measure external quantum efficiency with high sensitivity in small-area devices (<1 mm2). This allows for rapid fabrication of variable-pitch sub-wavelength hole arrays in metal films for use as transparent electrical contacts, and evaluation of the evanescent and propagating mode coupling to resonances in the active layer.

中文翻译：

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使用高亮度傅立叶变换方法表征等离子体孔阵列作为有机光伏的透明电触点

我们提出了一种用于探测原型光伏器件中光-物质相互作用的方法，该光伏器件由有机半导体活性层和半透明金属电触点组成，显示出基于表面等离子体的增强光传输。我们使用高亮度激光驱动光源和适当的耦合光学器件，在小于 100 μm 的光斑尺寸中实现了高光谱辐照度。可见光和近红外光谱区域的空间分辨傅立叶变换光电流光谱使我们能够在小面积器件 (<1 mm2) 中以高灵敏度测量外部量子效率。这允许在金属薄膜中快速制造可变间距亚波长孔阵列，用作透明电触点，