Back contact engineering for high performance kesterite solar cells

配电应用的增长定义了光伏的新纪元。预计将广泛部署在智能城市和物联网等领域，从周围的能源中获取能源将需要“自供电”的分布式应用程序。由钾锌矿吸收材料Cu2ZnSn(SxSe1-x)4(CZTSSe)制成的薄膜光伏器件结合了高效、低成本和无毒材料，为医疗保健、交通运输、建筑、航空航天和消费设备中的大量分布式应用提供了一种有吸引力的能量收集解决方案。凯斯特石太阳能电池具有通过纳米墨水进行基于溶液的制造的额外好处(Y.Qu，et al.程序。光伏发电。高效CZTSSe薄膜太阳能电池的制造能力有赖于获得足够高的开路电压。在这个项目中，我们的目标是通过设计背接触的界面来制造高性能的CZTSSe太阳电池。

The growth in distribution applications defines a new era for photovoltaics. Envisioned to be deployed widely in, for example, smart cities and Internet of Things, "self-powered" distributed applications will be required to harvest energy from surrounding energy sources. Thin film photovoltaics devices fabricated from the kesterite absorber Cu2ZnSn(SxSe1-x)4 (CZTSSe) combine high efficiency, low-cost and non-toxic materials, providing an attractive energy harvesting solution for the vast number of distributed applications in healthcare, transportation, construction, aerospace and consumer devices. Kesterite solar cells have the added benefit of solution-based fabrication via nanoparticle inks (Y. Qu, et al,. Prog. Photovolt. 2016) which is compatible with high volume and high value manufacturing.The ability to manufacture high efficiency CZTSSe thin film solar cells depends on achieving sufficiently high open circuit voltage. In this project, we aim to fabricate high performance CZTSSe solar cells by engineering the interface at the back contact.