Perovskite solar cell preparation method based on full-coating process

Abstract

The invention discloses a perovskite solar cell preparation method based on the full-coating process, and relates to solar cells. The perovskite solar cell preparation method based on the full-coating process is low in cost, high in efficiency and industrialized. The method comprises the steps that (1) an electron transfer layer, a perovskite active layer and a hole transfer layer are sequentially prepared on a transparent conductive substrate by the adoption of the coating process, and slot-die coating or spraying-type coating is adopted in the coating process; (2) the hole transfer layer is coated with a top electrode, and screen printing and knife coating are adopted for coating. The problem of the process and cost of evaporation and precious metal electrode printing are solved, and the problem that the perovskite layer may be damaged by high-temperature carbon paste is solved. The one-step annealing method is adopted, in other words, annealing is carried out at the temperature ranging from 70 DEG C to 150 DEG C after coating is carried out on all the functional layers. The manufacturing technology is further simplified, and the device performance and stability can be effectively improved.

Description

Technical field [0001] The present invention relates to solar cells, and in particular, to a preparation method of perovskite solar cells based on a full coating process. Background technique [0002] Perovskite solar cells refer to a solar cell that uses a large class of materials with a perovskite crystal structure as the photoelectric conversion active layer. This type of material has a suitable band gap, high absorption coefficient, and excellent carrier generation and separation capabilities. Coupled with its simple and low-cost thin film preparation method, perovskite solar cells have great potential. prospect. At present, perovskite films for perovskite solar cells are mainly prepared in the laboratory through methods such as spin coating, immersion, and high vacuum thermal evaporation; electrodes are prepared through thermal evaporation or printed metal electrodes. At present, the efficiency of small-area devices is close to 20%. However, its inability to effectiv...

AI Technical Summary

Problems solved by technology

However, because it cannot be effectively applied to the preparation of large-area devices and the high cost that metal electrodes may bring, the industrial development of perovskite solar cells is limited.