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首页> 外文期刊>Advanced energy materials >A Two-Resonance Tapping Cavity for an Optimal Light Trapping in Thin-Film Solar Cells
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A Two-Resonance Tapping Cavity for an Optimal Light Trapping in Thin-Film Solar Cells

机译：薄膜太阳能电池中的最佳光陷阱的两个共振攻腔。

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An optimal photon absorption in thin film photovoltaic technologies can only be reached by effectively trapping the light in the absorber layer provided a considerable portion of the photons is rejected or scattered out of such layer. Here, a new optical cavity is proposed that can be made to have a resonant character at two different nonharmonic frequencies when adjusting the materials or geometry configurations of the partially transmitting cavity layers. Specific configurations are found where a reminiscence of such two fundamental resonances coexists leading to a broadband light trapping. When a PTB7-Th: PC71BM organic cell is integrated within such cavity, a power conversion efficiency of 11.1% is measured. This study also demonstrates that when materials alternative to organics are used in the photoactive cell layer, a similar cavity can be implemented to also obtain the largest light absorption possible. Indeed, when it is applied to perovskite cells, an external quantum efficiency is predicted that closely matches its corresponding internal one for a broad wavelength range.
机译：薄膜光伏技术中的最佳光子吸收只能通过有效地将光捕获在吸收层中来实现，前提是相当一部分光子被拒绝或散射出该层。在此，提出了一种新的光学腔，当调整部分透射腔层的材料或几何结构时，可以使其在两个不同的非谐波频率下具有谐振特性。发现了这样的两个基本共振的共存导致宽带光陷波的特定配置。当将PTB7-Th：PC71BM有机电池集成到此类腔中时，测得的功率转换效率为11.1％。这项研究还表明，当在光敏电池层中使用替代有机物的材料时，可以实现类似的腔体，以获得最大的光吸收。的确，当将其应用于钙钛矿电池时，预计其外部量子效率在很宽的波长范围内与其对应的内部量子效率紧密匹配。

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