Preparing method of high active selenium source for selenylation, apparatus and applications

Abstract

The invention discloses a method for generating a highly active selenium source used for selenizing treatment, and a device and application thereof. The method comprises the steps of heating and vaporizing solid selenium to generate selenium gas; adding hydrogen or a mixture of hydrogen and argon to the selenium gas generated by the last step; and subjecting the mixture of gases in the last step to glow discharge decomposition and synthesis to obtain hydrogen selenide and highly active selenium gas. The device for generating the selenium source comprises an airtight reaction tank, a solid selenium source in the reaction tank, a positive and a negative glow discharge electrodes, a hydrogen selenide reaction cavity, as well as a heating device and an excitation power supply outside the reaction tank. A gas inlet is further arranged on the lateral wall of the reaction tank; a gas outlet is arranged on the top of the reaction tank. The method not only retains the advantages of the solid selenium, namely low cost, non-toxicity and easiness to transport and store, prepares the hydrogen selenide and the highly active selenium ambience with the characteristics of the hydrogen selenide and the highly active selenium, but also saves a large amount of selenide materials, reduces the cost and has important practical value.

Description

【Technical Field】 [0001] The invention belongs to the technical field of photovoltaic power generation and thin film solar cells, and specifically relates to a method, device and application of a high-activity selenium source in the preparation of multi-element compound semiconductor materials, especially copper indium gallium selenium thin film materials. 【Background technique】 [0002] Photovoltaic power generation is noise-free, pollution-free, simple to maintain, widely distributed and inexhaustible, and has a working life of 20 to 30 years. It is an ideal clean and renewable energy source. In today's situation where mineral resources are becoming increasingly scarce and environmental pollution is putting tremendous pressure on the sustainable development of human society, solar power generation is considered the most important new energy source in the 21st century, and its development potential is huge. [0003] Among various solar cells, thin-film cells have the advantages ...

AI Technical Summary

Problems solved by technology

In use, selenium vapor contains a large amount of selenium atomic chain Se n (2≤n≤8), poor activity, not easy to participate in the reaction, easy to form a desorption process on the surface of the film, resulting in many defects, unevenness and poor repeatability of the film

Since the selenium vapor contains a large number of selenium atoms that do not participate in the reaction, the waste of selenium materials is relatively large during use

Therefore, solid-state selenium sources have not been used as selenium sources for selenization in the production of CIGS solar cells.

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