Lateral spectrum splitting system with perovskite photovoltaic cells
Lateral spectrum splitting system with perovskite photovoltaic cells
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DOI：
10.1117/1.jpe.12.022206
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发表时间：
2022-04
影响因子：
1.7
通讯作者：
Benjamin D. Chrysler;S. Shaheen;R. Kostuk
中科院分区：
文献类型：
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作者：
Benjamin D. Chrysler;S. Shaheen;R. Kostuk
摘要。我们研究了具有钙钛矿光伏电池的多结光谱分离光伏（PV）太阳能系统的潜力。光谱分离允许横向分离不同能带隙光伏电池的组合，并避免了制造串联堆叠结构的复杂性。体全息光学元件已被证明对光谱分离操作是有效的，并且可以集成到紧凑的模块封装中。然而，光谱分离系统剩余的问题之一是实现高总体转换效率所需的低成本宽带隙和中带隙电池的可获取性。钙钛矿光伏电池已被制造成具有广泛的带隙能量，有可能满足多结光谱分离系统的要求。对一个光谱分离系统进行了评估，该系统结合了能带隙分别为2.30、1.63和1.25 eV且转换效率分别为10.4%、21.6%和20.4%的钙钛矿光伏电池，这些在文献中已通过实验证明。首先，提出了一种用于三个光谱带光谱分离的级联体全息透镜的设计。其次，开发了一个严格的耦合波模型用于计算级联全息图的衍射效率。该模型考虑了上下全息图中高阶衍射级之间的交叉耦合，这是以前的模型没有考虑到的，但在此通过实验验证包含了这一点。最后，分析了系统中的光学损耗，并计算出假设的功率转换效率为26.7%。
Abstract. We examine the potential of a multijunction spectrum-splitting photovoltaic (PV) solar energy system with perovskite PV cells. Spectrum splitting allows combinations of different energy band gap PV cells that are laterally separated and avoids the complications of fabricating tandem stack architectures. Volume holographic optical elements have been shown to be effective for the spectrum-splitting operation and can be incorporated into compact module packages. However, one of the remaining issues for spectrum splitting systems is the availability of low-cost wide band gap and intermediate band gap cells that are required for realizing high overall conversion efficiency. Perovskite PV cells have been fabricated with a wide range of band gap energies that potentially satisfy the requirements for multijunction spectrum-splitting systems. A spectrum-splitting system is evaluated for a combination of perovskite PV cells with energy band gaps of 2.30, 1.63, and 1.25 eV and with conversion efficiencies of 10.4%, 21.6%, and 20.4%, respectively, which have been demonstrated experimentally in the literature. First, the design of a cascaded volume holographic lens for spectral separation in three spectral bands is presented. Second, a rigorous coupled wave model is developed for computing the diffraction efficiency of a cascaded hologram. The model accounts for cross-coupling between higher diffraction orders in the upper and lower holograms, which previous models have not accounted for but is included here with the experimental verification. Lastly, the optical losses in the system are analyzed and the hypothetical power conversion efficiency is calculated to be 26.7%.