cuins 2 Single crystal preparation method and cuins 2 Single crystal preparation device

Abstract

The invention discloses a preparation method of CuInS2 monocrystals, comprising the following steps: uniformly mixing high-purity raw material powders Cu, In and S; vacuum packaging the mixed high-purity raw material powders into a reactor, and preparing a CuInS2 polycrystalline ingot by a single-temperature rocking-furnace mixed crystal method to be used as a raw material for growth of follow-up seeds and monocrystals, preparing a small CuInS2 monocrystalline ingot by a Bridgman method to be used as seeds; and finally growing large CuInS2 monocrystalline ingot by a magnetic field and a seed-assisted travelling heat method. The invention also discloses a preparation device of CuInS2 monocrystals. The preparation device is composed of a reaction vessel, a vertical furnace and an applied magnetic field system. According to the invention, the problem that growth rate is slow when CuInS2 crystals are prepared by a conventional travelling heat method is improved; growth rate of crystals and utilization rate of crystals are raised; preparation technological problems of large-diameter monocrystals CuInS2 are solved effectively; and theoretical and practical foundations are provided for preparation of CuInS2 thin film solar cells with excellent performance.

Description

technical field [0001] The invention relates to a crystal material growth process and device, in particular to a CuInS 2 The crystal growth process and device are applied in the technical field of functional materials of thin-film solar cells. Background technique [0002] With the rapid development of the modernization of human society, fossil fuel resources such as coal, oil, and natural gas are nearly exhausted, and a large amount of harmful gases will be produced when using these fossil resources, causing the deterioration of the human living environment. Photovoltaic solar energy, as a new energy and renewable energy, is one of the few sustainable and pollution-free energy sources. my country is rich in solar energy resources, and the development and utilization of solar energy is of great significance to saving conventional energy and protecting the natural environment. [0003] Compared with crystalline silicon solar cells, thin-film solar cells have obvious technic...

AI Technical Summary

Problems solved by technology

The vertical Bridgman method grows crystals faster, but the crystallization rate of this method is low, and the resulting ingot is often composed of multiple crystal grains

In solvent-assisted mobile heating and I 2 The gas phase transport method can avoid the disturbance caused by the phase transition during the growth process, and it is easier to obtain single crystal CuInS 2 Ingots, but their slow growth rate makes it difficult to apply in industrial production, so it is necessary to find a high-efficiency and high-quality CuInS 2 Single crystal preparation method

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