In this work, polymer solar cells (PSCs) with the configuration of ITO/PEDOT:PSS/P3HT:PCBM/back electrode with different back electrodes of silver (Ag), aluminum (Al), and Ag/Al alloy with various weight percentages were investigated. Different electrodes were deposited at the same conditions using the thermal evaporation process on the P3HT:PCBM active layer. Moreover, the effect of different electrodes on the cell's performance was investigated. The electrical properties of components, such as ideality factor (n), inverse saturation current, turning-on voltage (V_t), and mobility (μ), were evaluated using the J–V curves of the cells in the dark and irradiated conditions. The results showed that the use of Ag/Al alloys with higher Ag percentages as the back electrode reduced both series resistance (R_ss) and the reverse saturation current, and increased both shunt resistance (R_sh) and the mobility (μ). Furthermore, it increased the fill factor (FF) and power conversion efficiency (PCE) by improving the metal/polymer junction in these types of cells.

中文翻译：

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Ag/Al 电极在改善 PEDOT:PSS/P3HT:PCBM 太阳能电池性能中的作用

在这项工作中，聚合物太阳能电池 (PSC) 具有 ITO/PEDOT:PSS/P3HT:PCBM/背电极和不同重量百分比的银 (Ag)、铝 (Al) 和 Ag/Al 合金背电极被调查。在相同条件下使用热蒸发工艺在 P3HT:PCBM 活性层上沉积不同的电极。此外，研究了不同电极对电池性能的影响。元件的电气特性，例如理想因子（n), 反向饱和电流, 转向-上 电压 （V _Ť) 和流动性 (μ)，使用 J-V细胞在黑暗和辐照条件下的曲线。结果表明，使用具有较高 Ag 百分比的 Ag/Al 合金作为背电极降低了串联电阻（电阻_ss ) 和反向饱和电流，并增加了两个分流电阻 (电阻_sh ) 和流动性 (μ）。此外，它通过改善这些类型电池中的金属/聚合物结，提高了填充因子 (FF) 和功率转换效率 (PCE)。