A tandem solar cell including of CuIn _1-y Ga _y Se ₂ /Si _1-x Ge _x was exhibited by integrating a CuIn _1-y Ga _y Se ₂ solar cell on a Si1 - xGex solar cell to achieve a conversion efficiency of about 26% by controlled current matching. Electrical analyses were used to determine the performance parameters of the bottom and top sub-cells. In this work, an experimental Si _0.73 Ge _0.27 solar cell has been modelled. The photovoltaic characteristics of the Si _0.73 Ge _0.27 solar cell are in good agreement with its experimental counterpart. Afterwards, a copper-gallium-diselenide (CGS)/Si _0.73 Ge _0.27 tandem solar cell with 24.1% efficiency has been designed. Additionally, the bandgap combination of CuIn _1-y Ga _y Se ₂ /Si _1-x Ge _x structure has been studied. The findings indicate that CuIn _1-y Ga _y Se ₂ /Si _1-x Ge _x tandem cell with 0.7 <; y<; 1 and 0 <; x<; 0.7 can achieve acceptable efficiency and the optimised CGS/Si device with 26.1% efficiency is proposed. In CGS/Si _0.73 Ge _0.27 tandem cell, the current matching is obtained when the CGS thickness of the top cell is 1 μm and the Si _0.73 Ge _0.27 absorber thickness of the bottom cell is 1.9 μm. The current matching condition for this device degrades the fill factor, although increases the current, so the device does not achieve maximum output power.

中文翻译：

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CuIn _1的设计_???ÿ嘎_ÿSe ₂ / Si _{1 ?????????X}通用电器_X 具有可控电流匹配的串联太阳能电池

通过将CuIn _1-y Ga _y Se ₂太阳能电池集成在Si1-xGex太阳能电池上以实现约120的转换效率，展示了 包括CuIn _1-y Ga _y Se ₂ / Si _1-x Ge _x的串联太阳能电池 。通过控制电流匹配达到26％。电分析被用来确定底部和顶部子电池的性能参数。在这项工作中，已对实验的Si _0.73 Ge _0.27太阳能电池进行了建模。Si _0.73 Ge _0.27的光伏特性 太阳能电池与其实验对应物非常吻合。之后，设计了效率为24.1％的铜镓二硒化物（CGS）/ Si _0.73 Ge _0.27串联太阳能电池。另外，还研究了CuIn _1-y Ga _y Se ₂ / Si _1-x Ge _x 结构的带隙组合 。结果表明，CuIn _1-y Ga _y Se ₂ / Si _1-x Ge _x串联电池的0.7 <; y <; 1和0 <; x <; 0.7可以达到可接受的效率，并提出了具有26.1％效率的优化CGS / Si器件。在CGS / Si中 _0.73 Ge _0.27串联电池，当顶部电池的CGS厚度为1μm，底部电池的Si _0.73 Ge _0.27吸收体厚度为1.9μm时，可获得电流匹配 。该器件的电流匹配条件虽然会增加电流，但会降低填充系数，因此该器件无法实现最大输出功率。