We fabricated a novel nanocomposite composed of graphene-La₂CrFeW₆ perovskite compounds with an organic-inorganic counter electrode based on CdSe, gallic acid, urea and sulfate in dye-sensitized solar cells (DSSCs) by a simple hydrothermal technique. The nanocomposite shows an excellent electro–catalytic activity with low charge-transfer resistance, due to the synergetic catalytic effects of the graphene sheets and La₂CrFeW₆ perovskite with organic-inorganic materials. The special structure of this nanocomposite also improves the active sites for reduction of triiodide ions on the counter electrodes. The photo-conversion efficiency of the DSSC fabricated using a gallic-based counter electrode reached a higher value of 10.40% under standard illumination (1 sun, 100 mW cm⁻², AM 1.5), as compared to the traditional Pt electrode (7.49%). The graphene-La₂CrFeW₆ fabricated with an organic-inorganic based CE was also found to be more efficient than those reported in previous works, in which graphene, produced by various methods, was used as a CE material. Therefore, the present nanocomposite is considered an environmentally friendly, low-cost, and highly efficient CE material for DSSCs.

我们通过简单的水热技术在染料敏化太阳能电池（DSSC）中制备了由石墨烯-La ₂ CrFeW ₆钙钛矿化合物与基于CdSe，没食子酸，尿素和硫酸盐的有机-无机对电极组成的新型纳米复合材料。由于石墨烯片和La ₂ CrFeW ₆的协同催化作用，纳米复合材料显示出优异的电催化活性，且电荷转移电阻低。钙钛矿与有机无机材料。这种纳米复合材料的特殊结构还改善了对电极上三碘离子还原的活性位。与传统的Pt电极（7.49％）相比，使用镓基对电极制造的DSSC在标准光照（1个太阳，100 mW cm ^-2，AM 1.5）下的光转换效率达到了10.40％的更高值。）。石墨烯-La ₂ CrFeW ₆还发现，用有机-无机基CE制成的石墨烯比以前的工作更有效，在以前的工作中，通过各种方法生产的石墨烯被用作CE材料。因此，本纳米复合材料被认为是用于DSSC的环保，低成本和高效CE材料。