Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case School of Engineering, Case Western Reserve University , 10900 Euclid Avenue, Cleveland, Ohio 44106, United States.
Nano Lett. 2014 Mar 12;14(3):1467-71. doi: 10.1021/nl4046284. Epub 2014 Feb 17.
Tandem polymer solar cells (PSCs), consisting of more than one (normally two) subcells connected by a charge recombination layer (i.e., interconnecting layer), hold great promise for enhancing the performance of PSCs. For an ideal tandem solar cell, the open circuit voltage (Voc) equals to the sum of those of the subcells while keeping the short circuit current the same as the lower one, leading to an increased overall power conversion efficiency. The interconnecting layer plays an important role in regulating the tandem device performance. Here, we report that graphene oxide (GO)/GO-Cs (cesium neutralized GO) bilayer modified with ultrathin Al and MoO3 can act as an efficient interconnecting layer in tandem PSCs to achieve a significantly increased Voc, reaching almost 100% of the sum of the subcell V(oc)s under standard AM 1.5 conditions.
串联聚合物太阳能电池（PSCs）由通过电荷复合层（即互连层）连接的一个以上（通常为两个）子电池组成，有望提高 PSCs 的性能。对于理想的串联太阳能电池，开路电压（Voc）等于子电池 Voc 的总和，同时保持短路电流与较低的子电池相同，从而提高整体功率转换效率。互连层在调节串联器件性能方面起着重要作用。在这里，我们报告了氧化石墨烯（GO）/GO-Cs（中和的 GO）双层经超薄 Al 和 MoO3 修饰后可用作串联 PSCs 中的有效互连层，以在标准 AM 1.5 条件下显著提高 Voc，达到子电池 Voc 的总和的近 100%。
