Method for efficiently and stably preparing large-area perovskite solar cell based on porphyrin doping

Abstract

The invention belongs to the field of preparation of perovskite solar cells, and particularly relates to a method for efficiently and stably preparing a large-area perovskite solar cell based on porphyrin doping. The method is mainly characterized by comprises the following steps that firstly, a simple and convenient porphyrin and porphyrin derivative synthetic path is provided; secondly, a traceamount of porphyrin or a trace number of porphyrin derivatives are added into a perovskite pecursor solution; thirdly, a black and dense perovskite film is formed; and fourthly, a perovskite layer iscoated with the perovskite film containing the porphyrin and porphyrin derivative in a spinning mode, a hole transporting layer and an electrode layer are coated in sequence, and the perovskite solarcell is formed. The method has the beneficial effects that the perovskite film is doped with ammonium-based porphyrin, effective crystallization control over the perovskite film is achieved successfully, because the ammonium-based porphyrin has the properties of a surfactant, the film formation property of the solution is improved after the ammonium-based porphyrin is added into the solution, andthe pinhole-free and uniform large-area perovskite film is prepared through a scrape-coating process.

Description

technical field [0001] The invention belongs to the field of preparation of perovskite solar cells, and in particular relates to a method for preparing efficient and stable large-area perovskite solar cells based on porphyrin doping. Background technique [0002] At present, the stability of perovskite solar cell devices and the production of large-area devices are still the biggest challenges to achieve commercial production. In previous reports, organic small molecule doping is usually used to passivate the perovskite grain boundary to improve stability, but such a method often leads to a decrease in the efficiency of the battery device, especially the preparation of large-area high-quality perovskite films cannot be achieved. . [0003] In recent years, organic-inorganic hybrid perovskite solar cells (PSCs) have attracted much attention due to their high conversion efficiency, low cost, and easy processing. At present, the certified efficiency of small-area perovskite s...

AI Technical Summary

Problems solved by technology

In order to deal with the internal grain boundaries, it has been reported that at present, organic small molecules are used to modify perovskite films. Unfortunately, it is difficult for small molecules to inhibit the escape of organic cations in the perovskite film during heat treatment, and defects will still occur.

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