Development of wide bandgap perovskites for next-generation low-cost CdTe tandem solar cells
Development of wide bandgap perovskites for next-generation low-cost CdTe tandem solar cells
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DOI：
10.1016/j.ces.2019.01.003
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发表时间：
2019-05
影响因子：
4.7
通讯作者：
Timothy D. Siegler;T. Shimpi;W. Sampath;B. Korgel
中科院分区：
文献类型：
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作者：
Timothy D. Siegler;T. Shimpi;W. Sampath;B. Korgel
为了继续长期降低光伏(PV)太阳能电池产生的能源价格，需要进行技术创新，在不增加制造成本的情况下实现设备效率的显著提高。一种方法是利用现有的能力以非常低的成本制造薄膜CdTe PVs，并添加另一种廉价的薄膜吸收材料来创建串联太阳能电池，以提高器件效率。为此，必须确定具有最佳带隙的半导体，以及合适的器件架构。宽禁带钙钛矿型甲基溴化铅(CH3NH3PbBr3，MAPBr3)具有与之匹配的2.3 eV的带隙。它可以在较低的温度下加工，也适用于CIGS和全钙钛矿陶瓷。我们制作了MAPBR PVs，发现在这些钙钛矿层中，光学散射或雾气是显著的。这限制了到达底部电池的透射光。使用1D太阳能电池电容模拟器(SSABS)软件包对四端钙钛矿型(4T)钙钛矿-镉镉串联电池的性能进行了建模，以确定与镉镉电池相比，可以容忍多少雾气，并且仍然实现了效率提升。
To continue towards long-term reduction in the price of energy generated by photovoltaic (PV) solar cells, technological innovations are needed to achieve significant increases in device efficiency without increasing manufacturing costs. One approach is to utilize the existing capability to manufacture thin film CdTe PVs at very low cost and add another inexpensive thin film absorber to create a tandem solar cell to improve device efficiency. For this, a semiconductor with an optimal bandgap must be identified, along with a suitable device architecture. The wide bandgap perovskite methylammonium lead bromide (CH3NH3PbBr3, MAPBr) has a well-matched band gap of 2.3 eV for a CdTe tandem device. It can be processed at relatively low temperature, and is also suitable for CIGS and all-perovskite tandems. We fabricated MAPBr PVs and found that optical scattering, or haze, was significant in these perovskite layers. This limits the transmitted light reaching the bottom cell. The performance of a four-terminal (4T) perovskite-CdTe tandem cell was modeled using the 1D Solar Cell Capacitance Simulator (SCAPS) software package to determine how much haze could be tolerated and still achieve an efficiency boost compared to the CdTe cell.