Planar perovskite photovoltaic cell with metal phthalocyanine compound as electron transfer layer

Abstract

The invention relates to a planar perovskite photovoltaic cell with a metal phthalocyanine compound as an electron transfer layer and belongs to the field of optoelectronic materials and devices. The cell is composed of a transparent conducting substrate, a hole transfer layer, a perovskite light absorption layer, the electron transfer layer, an electrode modifying layer and a metal electrode. The cell has the advantages that the metal phthalocyanine compound growing through a primary vacuum deposition method serves as the electron transfer layer to replace a traditional electron transfer layer based on a fullerene derivative. The prepared metal phthalocyanine compound has stable chemical properties, has good heat resistance, sun proofing, acid resistance and alkali resistance, and the perovskite light absorption layer can be well protected. The metal phthalocyanine compound is applied to the perovskite photovoltaic cell, the cost of the cell is reduced, and the service life of the cell is prolonged. The perovskite photovoltaic cell with the metal phthalocyanine compound as the electron transfer layer is high in photoelectric conversion efficiency, simple in structure, low in cost and stable in performance.

Description

technical field [0001] The invention relates to a planar perovskite photovoltaic cell using a metal phthalocyanine compound as an electron transport layer, belonging to the field of optoelectronic materials and devices. Background technique [0002] With the rapid development of human society, the world's demand for various energy sources has increased dramatically, and many countries are facing serious energy security issues. Severe energy and environmental crises have prompted human beings to look for new energy sources that can replace traditional fossil fuels. People pin their hopes on the development and utilization of new energy sources including wind energy, nuclear energy, and tidal energy. But these energy sources have their own limitations. For example, wind energy and tidal energy are greatly restricted by natural conditions and regions, while the development of nuclear energy is not only costly, but also the safety issue faced by nuclear energy is a hidden worr...

AI Technical Summary

Problems solved by technology

Although perovskite photovoltaic cells using C60 and PCBM as electron transport layers have achieved high energy conversion efficiency, C60 and PCBM as electron transport layers of perovskite photovoltaic cells are not perfect

This is mainly reflected in: (1) C60 and PCBM are expensive, and the unit price of C60 is about 500 yuan / gram, while the unit price of PCBM has reached several thousand yuan / gram; (2) the chemical properties of C60 and PCBM are very unstable

Under the conditions of light and water and oxygen, the LUMO energy level of C60 and PCBM shifts, resulting in a decrease of several orders of magnitude in their electronic conductivity, so it is difficult to obtain high stability and long-life perovskite photovoltaics using C60 and PCBM as electron transport layers. Battery