Method for preparing ferrous disulfide film by chemical bath deposition and vulcanization

Abstract

The invention relates to a method for preparing a ferrous disulfide film by chemical bath deposition and vulcanization. The method comprises the following steps: adopting citric acid or malonic acid as a complex agent; obtaining uniform, compact and high-crystallized precursor films on modified general glass in a water bath environment of less than 100 DEG C; vulcanizing; and quickly cooling to obtain the FeS2 film with the purity of not less than 99%. The citric acid or the malonic acid is adopted as the complex agent for complexing metal ions, so that a large amount of ferrous ions and sulfur ions can be inhibited to be not subjected to homogeneous deposition in a solution during early reaction period, thereby enabling heterogeneous deposition to become a main body and being favorable for film formation. Through the adoption of a water bath heating way, a reaction solution is uniformly heated, and the film statically and slowly grows and is uniform and compact. Through the adoption of a quick cooing way, impurity phases are dynamically reduced to improve the purity of the film. The ferrous disulfide film has no selectivity for a substrate, is synthesized in a low-temperature solution, is good in crystallinity, simple in process and low in cost, and is suitable for large-scale production application.

Description

technical field [0001] The invention relates to a chemical bath deposition and sulfide synthesis of FeS 2 The thin film method belongs to the technical field of preparation of functional thin film materials. Background technique [0002] With the advancement of science and technology and the development of human civilization, primary energy such as coal, oil and natural gas can no longer meet the needs. Moreover, a large amount of harmful gases will be released during the use of primary energy, which will destroy environment for human survival. Therefore, among various renewable energy sinks, solar energy has become the focus of new energy, and one of the main forms of development is to try to effectively convert solar energy into electrical energy for the benefit of mankind. [0003] Solar cells are effective devices for directly converting solar energy into electrical energy, but the rapid development of commercial solar cells still faces some problems that limit their l...

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Problems solved by technology

However, most of these preparation methods have high requirements on equipment, need vacuum, high temperature and other conditions, and the cost of film production is high; and due to the complexity of the reaction, it is difficult to control the chemical composition ratio of the prepared film, resulting in low purity of the film. In turn, it will affect the photoelectric performance of the film, which is not conducive to large-scale production

In addition, the electrodeposition method has restrictions on the choice of the substrate of the film, and the substrate must be a conductive substrate, which also limits the industrial development of this method.

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