Perovskite solar cells are well known for being low cost, solution‐based, and efficient solar cells; however, the high price of the conventional hole‐collector electrode (Spiro‐OMeTAD/Gold) and the high price and complexity of depositing gold on large scales are major barriers against commercializing them. Herein, an effective carbon composite electrode is introduced for a low‐cost perovskite solar cell with CuIn_0.75Ga_0.25S₂ hole transport material to solve this problem. The carbon electrode is deposited by the doctor blade method using a paste composed of flakes of graphite, carbon black, and a kind of hydrophobic polymer (polystyrene or poly‐methyl methacrylate). It is investigated how the weight ratio of carbon black to graphite and type of binder affect sheet resistance and resistivity of carbon composite layer. The effects of carbon electrode composition on the charge transport resistance at the CuIn_0.75Ga_0.25S₂/perovskite interface are investigated using impedance spectroscopy in different light intensities of white light and light with different wavelengths of 530, 660, and 740 nm. The best efficiency of 15.9% is obtained for the champion cell (fabricated outside the glovebox), which is close to the best efficiency of the reference cell with conventional Spiro‐OMeTAD/Gold hole‐collector that is 16.3%.

中文翻译：

---

具有无机CuIn0.75Ga0.25S2空穴传输材料的低成本钙钛矿太阳能电池的有效碳复合电极

钙钛矿太阳能电池以低成本，基于解决方案的高效太阳能电池而闻名。然而，常规空穴收集电极（Spiro-OMeTAD / Gold）的高价格以及大规模沉积金的高价格和复杂性是阻碍其商业化的主要障碍。本文介绍了一种有效的碳复合电极，用于含CuIn _0.75 Ga _0.25 S ₂的低成本钙钛矿太阳能电池空穴输送材料解决了这个问题。碳电极通过刮刀法使用由石墨，炭黑和一种疏水性聚合物（聚苯乙烯或聚甲基丙烯酸甲酯）组成的糊状物沉积。研究了炭黑与石墨的重量比和粘合剂类型如何影响碳复合层的薄层电阻和电阻率。碳电极组成对CuIn _0.75 Ga _0.25 S ₂处的电荷输运电阻的影响在不同的白光强度和530、660和740 nm的不同波长的光强度下，使用阻抗光谱法研究了钙钛矿/钙钛矿的界面。冠军电池（在手套箱外部制作）的最佳效率为15.9％，与传统Spiro-OMeTAD /金孔收集器的参考电池的最佳效率接近16.3％。