In the few past years, the economic and eco-friendly Cu₂ZnSnS₄ (CZTS) solar cells have caught lots of attentions. However, due to rather poor efficiency, identifying deficiencies and making improvements is necessary. In the present study, the performance improvement of ultrathin CZTS solar cells was achieved through (1) incorporation of anti-reflective coating (ARC) on the surface of cell and (2) embedding Al plasmonic nanostructures with different radius, periods, and vertical positions in the absorber layer. Various thicknesses of CZTS absorber layer were simulated optically and electrically using FDTD and DEVICE solver of Lumerical software. The reference solar cell consists of a 1.5-nm-thick CZTS absorber and exhibit an efficiency of up to 5.67%, short-circuit current density (Jsc) of 18.48 mA cm⁻² and open circuit voltage of 0.58 V. Result showed a remarkable performance enhancement of the solar cell in spite of a very thin absorber layer. For a 500-μm-thick CZTS solar cell with the assistance of ARC and embedding Al plasmonic nanostructures, the efficiency is increased to 7.45% due to an increase in Jsc to 22.62 mA cm⁻² with an open circuit voltage of 0.62 V.

在过去的几年中，经济和环保的Cu ₂ ZnSnS ₄（CZTS）太阳能电池备受关注。但是，由于效率很差，因此必须找出缺陷并进行改进。在本研究中，超薄CZTS太阳能电池的性能改进是通过（1）在电池表面上加入抗反射涂层（ARC）和（2）嵌入具有不同半径，周期和垂直位置的Al等离子体纳米结构而实现的在吸收层中。使用FDTD和Lumerical软件的DEVICE求解器，通过光学和电学方法模拟了各种厚度的CZTS吸收层。参考太阳能电池由1.5nm厚的CZTS吸收器组成，效率高达5.67％，短路电流密度（Jsc）为18.48 mA cm ^-2开路电压为0.58V。结果表明，尽管吸收层非常薄，但太阳能电池的性能却得到了显着提高。对于具有ARC并嵌入Al等离子体纳米结构的500μm厚的CZTS太阳能电池，由于Jsc增加到22.62 mA cm ^-2且开路电压为0.62 V ，效率提高到7.45％。