Green solvent system for preparing perovskite layer of perovskite solar cell and mixed solution

Abstract

The invention provides a solvent system for preparing a perovskite layer of a perovskite solar cell. The system comprises dimethyl carbonate and another solvent; and the other solvent comprises one ormultiple selected from N-methyl 2 pyrrolidone, gamma-butanolide, isopropanol and acetone. The dimethyl carbonate is used in cooperation with the other solvent of N-methyl 2 pyrrolidone and the like,the solvent system is green and degradable, and the environment can be protected. The perovskite solar cell prepared by the solvent system can regulate the morphology of the perovskite layer effectively under the condition of short-time thermal annealing or event without thermal annealing, the problem that technology is hard to control accurately during annealing by solvent steam, and requirementsfor high-flux coil-to-coil printing in future can be met. The preparation technology is simple, conditions are mild, and the system and solution have significance in the commercialized progress of the perovskite solar cell.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and relates to a green solvent system and a mixed solution for preparing a perovskite layer of a perovskite solar cell, in particular to a solvent for preparing a perovskite layer of a perovskite solar cell A system and a mixed solution, a method for preparing a perovskite layer of a perovskite solar cell, and the perovskite solar cell. Background technique [0002] In recent years, in order to solve the increasingly severe energy and environmental problems, people have turned their attention to the development and utilization of new energy. Among various new energy technologies, photovoltaic power generation is undoubtedly one of the most promising directions. Although traditional silicon-based solar cells have achieved industrialization and have a relatively mature market, their cost performance cannot compete with traditional energy sources, and the pollution and energy consump...

AI Technical Summary

Problems solved by technology

[0005] But so far, there are not many studies on the industrialization and application of perovskite solar cells. Taking the preparation process of perovskite layer as an example, the solvents required for its preparation often use solvents such as DMF and DMSO, which have higher boiling points and Low volatility usually requires high and long-term temperature annealing, accompanied by solvent vapor annealing and other difficult-to-control processing processes, which is not conducive to the use of high-throughput roll-to-roll printing technology to prepare perovskite solar cells. Industrialization promotion

More importantly, the above-mentioned solvents still have low toxicity, which is harmful to environmental protection and does not conform to the development concept of today's green technology.

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