Tandem organic solar cells (OSCs), consisting of more than one (usually two) sub-cells, stacked and connected by a charge recombination layer (i.e., interconnecting layer (ICL)), are highly promising to boost OSC efficiency. The ICL plays a critical role in regulating the performance of tandem device. Here, we report ZnO or C₆₀ as a simple ICL, modified then, by a PEDOT:PSS layer, can act as an efficient ICLs in tandem device to achieve a significant increase in performance compared to single sub-cell. After optimized optical properties of MEH-PPV:PC₇₀BM and P3HT:PC₇₀BM sub-cells by varying the annealing temperature, these ICLs are used to connect photoactive layers. For all tandem devices, we showed an improvement in optical properties, especially in the ground and excited states compared to optimized single sub-cells. The degree of improved performance in tandem devices is attributed to the connection which provides each ICL. For fully optimized tandem, based on C₆₀ ICL, reached ~78% enhancement in charge transfer compared to the bottom sub-cell and 82% compared to the top sub-cell, obtained for λ_emission = 650 nm.

串联有机太阳能电池 (OSC) 由一个以上（通常为两个）子电池组成，通过电荷复合层（即互连层 (ICL)）堆叠和连接，非常有希望提高 OSC 效率。ICL 在调节串联设备的性能方面起着关键作用。在这里，我们将 ZnO 或 C ₆₀报告为简单的 ICL，然后通过 PEDOT:PSS 层进行修改，可以作为串联设备中的高效 ICL，与单个子电池相比，性能显着提高。MEH-PPV:PC ₇₀ BM 和 P3HT:PC ₇₀光学性能优化后BM 子电池通过改变退火温度，这些 ICL 用于连接光敏层。对于所有串联器件，与优化的单个子电池相比，我们表现出光学特性的改进，尤其是在基态和激发态。串联器件的性能改进程度归因于提供每个 ICL 的连接。对于完全优化的串联，基于 C ₆₀ ICL，与底部子电池相比，电荷转移达到了约 78%，与顶部子电池相比达到了 82%，在λ_发射= 650 nm 时获得。