Preparation method of TiO2 cookie-like microsphere and method for preparing perovskite solar cell

Abstract

The invention discloses a preparation method of a TiO2 cookie-like microsphere and a method for preparing a perovskite solar cell. The preparation method of the TiO2 microsphere comprises the following steps: after mixing acetonitrile, isopropanol and acetylacetone, dropwise adding tetrabutyl titanate and tetrabutyl ammonium hydroxide as a controlling agent, heating for 12 -20 hours at 160 DEG C -200 DEG G, precipitating, centrifugal washing and drying, and then high-temperature annealing to obtain TiO2 microsphere powder; mixing the obtained powder with P25 to prepare a slurry which is spin-coated on a FTO which has been coated with a compact layer and is served as a mesoporous layer of the perovskite solar cell; spin-coating MAPbI3 and Spiro-OMeTAD successively on the TiO2 film, and finally vapor-depositing a layer of Au. The TiO2 microsphere having a high specific surface area adopts a one-step hydrothermal method, the preparation process is simple and the cost is low; the preparedTiO2 film exhibits excellent conductivity and absorption effect on visible light; and the prepared TiO2 film is applied to the perovskite solar cell, thereby obtaining excellent photoelectric conversion efficiency, and providing the possibility to prepare large-area, low-cost and high-efficiency perovskite solar cells.

Description

technical field [0001] The invention belongs to the field of solar cells, specifically TiO 2 A method for preparing cookie-like microspheres and a method for preparing perovskite solar cells. Background technique [0002] The nanomaterials used as the mesoporous layer of perovskite solar cells (PSC) need to meet the following characteristics: first, good light transmission, which can transmit more incident light and reduce light loss; second, its conduction band energy level The position can match the energy level of the light-absorbing material to reduce the energy loss of excitons; three, excellent electron transport performance, effectively inhibiting the recombination of electrons and holes; four, large porosity and specific surface area, which is conducive to enhancing the incident light Reflection inside the cell improves the light-harvesting capability of the device. At this stage, TiO is commonly used as the material of PSC mesoporous layer. 2 , ZnO, NiOx and ZrO2...

AI Technical Summary

Problems solved by technology

The same two-step method also has its own shortcomings. When the thickness of the synthesized perovskite exceeds 200nm, it is difficult for MAI ions to enter the PbI 2 , resulting in the inability to obtain pure MAPbI 3 , which also greatly reduces the performance of the battery

Images