Chemical etching, cleaning and drying method of single-crystal silicon solar battery and integrated processing machine

Abstract

Monocrystalline silicon solaode chemical etching, washing, drying method and integral processor belong to technique field of chemical etching technique and washing. It characterized in that it not only includes water, acid, alkali, but also ultrasonic participates in etching and washing course: it includes following steps: (1) ultrasonic washes and heats in advance, (2) ultrasonic removes damnification layer, (3) ultrasonic makes herbs into wool, (4) ultrasonic rinses, (5) washing with acid to counteract, (6) ultrasonic rinses, (7) cutting water, (8) hot enthalpy to dry. Positive effects of the invention are: adopting ultrasonic to etch and wash, liquid of making wool can be acted with silicon piece, similar coarseness degree can be generated on surface, perfect pyramid pattern can be obtained; it also eliminates kalium, natrium ion from alkalescent solution, and extends service life of silicon piece; pollution can be decreased, energy consumption and water source can be saved greatly, it is a practical invention.

Description

technical field [0001] The invention belongs to the field of chemical etching technology and cleaning technology. Background technique [0002] Solar photovoltaic power generation is an important part of new energy and renewable energy, and is considered to be the most promising new energy technology in the world. Silicon solar cells are the core components of photovoltaic power generation. High-efficiency silicon solar cells need to reduce radiation and enhance light collection through surface texture structures. Textures such as monocrystalline silicon are usually treated with an alkaline solution. Silicon wafers must be cleaned before and after the texturing process. The traditional method of processing texture is: washing - soaking lye to remove the damaged layer (20-30% NaOH) - stirring alkali corrosion texturing - running water rinsing - hydrochloric acid cleaning (3-5%) - running water rinsing - Cleaning with hydrofluoric acid (3-5%) - Rinsing with running water - ...

AI Technical Summary

Problems solved by technology

This process needs to consume a lot of water to complete the production and cleaning of the texture, and hydrochloric acid and hydrofluoric acid will cause harm to the operator and pollute the surrounding environment. slice cleanliness

More importantly, if the hydrochloric acid and hydrofluoric acid on the silicon wafer are not thoroughly cleaned, it will cause delayed corrosion of the silicon cell after a long time, which will affect the service life of the solar cell

The traditional production process has high energy consumption, serious pollution, complex sewage treatment and air purification

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