A method for preparing cadmium sulfide nano film by deep ultraviolet photochemical water bath deposition

Abstract

The invention, which relates to the technical field of the semiconductor optoelectronic material, provides a method for preparing a cadmium-sulfide nano film based on deep ultraviolet photochemical bath deposition. A metal source CdSO4, a sulfur source Na2S2O3, and a sulfur source release control agent containing SO3<2-> and an H2SO4 solution are mixed to obtain a deposition solution, wherein the pH of the deposition solution is stabilized to be 3.5 to 4.0; a substrate is immersed into the deposition solution, wherein the distance between the surface of the deposition solution and the upper surface of the substrate is less than 1mm; and radiation is carried out by using LED deep-ultraviolet light, thereby forming a cadmium-sulfide nano film. Using the method, the sulfur source release can be controlled, thereby improving homogeneity of film growing. Compared with the common photochemical deposition technology, the provided method has the following beneficial effects: the deep ultraviolet light source has the low power and the heating effect is low; on the basis of the optical design, the deep ultraviolet light intensity is uniform in a fixed range; and the high-quality cadmium-sulfide nano film that can meet the requirement of the buffer layer of the copper-indium-gallium-selenium solar cell, has high uniformity, and is in close contact with the substrate can be prepared.

Description

technical field [0001] The invention belongs to the technical field of semiconductor optoelectronic materials, and in particular relates to a method for preparing a cadmium sulfide nano film by deep ultraviolet photochemical water bath deposition. Background technique [0002] In recent years, due to the excessive consumption of energy and the gradual increase of environmental pollution, the utilization and development of renewable energy has become more and more urgent. This is a major challenge that mankind is facing, and it has also brought new energy technologies Huge opportunity. Solar energy is an inexhaustible, clean and efficient renewable energy. Solar photovoltaic power generation converts solar energy into electrical energy through photoelectric conversion of photovoltaic devices such as solar cells, and has become the safest and safest renewable energy. Environmentally friendly and top potential contender. At present, thin-film solar cells have become the mains...

AI Technical Summary

Problems solved by technology

However, the film growth rate of the CBD method is relatively fast, and the reaction cannot be controlled after the start, and a large amount of wastewater treatment will be involved in industrial production.

The electrochemical deposition method requires a conductive substrate and the process is complex, so the application of this method is limited

while other vacuum processes are too costly to be used in solar cell processes

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