Perovskite solar cells based on cellulose modified hole transport layer

Abstract

The invention is a perovskite solar cell based on a cellulose-modified hole-transporting layer. There are five functional layers sandwiched between the lower transparent electrode and the upper electrode layer. It is characterized in that: the five functional layers are from bottom to The hole transport layer, the cellulose interface modification layer, the perovskite active layer and the electron transport layer, and the buffer layer are in sequence, and the hole transport layer, the cellulose interface modification layer, the perovskite active layer and the electron transport layer are all The film was prepared by a low-temperature solution method. In the present invention, a thin layer of cellulose film is added between the air-blood transport layer and the perovskite active layer of the perovskite solar cell. The cellulose can improve the surface wettability of nickel oxide, and it is easy to form a continuous and uniform perovskite film. The photoelectric conversion efficiency of titanium ore solar cells has increased from 12.52 to 13.37, an increase of 6.8%, with good repeatability and low cost, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a perovskite solar cell based on a cellulose-modified hole transport layer. Background technique [0002] With the increasing development of heavy industry, non-renewable resources such as coal and oil are frequently in urgent need, and energy issues have increasingly become the bottleneck of international social and economic development. Coupled with the improper use of non-renewable resources, environmental problems have become more and more serious, and human survival has been greatly threatened. Environmentally friendly and renewable resources such as solar energy are increasingly concerned by human beings. Solar cells are an important way for human society to deal with the crisis of energy depletion and solve environmental pollution problems. [0003] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or...

AI Technical Summary

Problems solved by technology

As long as it is illuminated by light, it can instantly output voltage and generate current with a loop. However, due to the limitations of its film thickness, material characteristics and preparation process, the thickness of perovskite thin film solar cells is usually about several hundred nanometers. To a certain extent, it restricts its absorption of visible light and restricts the increase of its current density.

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