Blocking-layer are very important for the overall efficiency improvement in perovskite solar cells, PSCs. This layer must be thin enough to allow the light to reach the perovskite layer and have low electrical resistance for electron flow to the external circuit and, at the same time, inhibit recombination processes on the FTO surface. In this work, the preparation of the TiO₂ compact layer by the Layer-by-Layer technique for the use in PSCs is presented. Evaluation of layers having different thickness by several techniques demonstrated that these layers have an optimum thickness and a balance between their electrical resistance and electron recombination is responsible for the improvement in the performance of the cells.

阻挡层对于钙钛矿型太阳能电池（PSC）整体效率的提高非常重要。该层必须足够薄，以允许光到达钙钛矿层，并具有低电阻，以防止电子流到外部电路，同时抑制FTO表面的复合过程。在这项工作中，介绍了通过逐层技术制备用于PSC的TiO ₂致密层。通过几种技术对具有不同厚度的层的评估表明，这些层具有最佳的厚度，并且其电阻和电子复合之间的平衡有助于改善电池的性能。