Solar cell preparation method capable of finishing diffusion, surface passivation and anti-reflection in one step

Abstract

The invention belongs to the technical field of solar photovoltaic cells, in particular to a solar cell preparation method capable of finishing diffusion, surface passivation and anti-reflection in one step. The solar cell preparation method capable of finishing diffusion, surface passivation and anti-reflection in one step includes steps that spin-coating or spraying a diffusion source or a gas source to the surface of a semiconductor chip; heating the semiconductor chip in the air, and meanwhile, forming a p-n junction, and passivation layers and anti-reflection films at the upper and lower surfaces; preparing an upper electrode and a lower electrode. The solar cell preparation method capable of finishing diffusion, surface passivation and anti-reflection in one step greatly simplifies the solar cell preparation technique based on guaranteeing a high conversion efficiency of the cell, and moreover, the solar cell preparation method has low requirement on equipment, the preparation process is safe, nontoxic and simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic cells, and in particular relates to a method for preparing a solar cell. Background technique [0002] At present, the focus of the photovoltaic industry is cost, especially for silicon solar cells with mature technology, the cost must be reduced under the premise of ensuring efficiency. Conventional silicon solar cells generally require cleaning and texturing equipment to make texture, diffusion equipment to form pn junctions, passivation material equipment to prepare passivation layers on the upper and lower surfaces, anti-reflection film equipment to prepare anti-reflection films, and metal electrode manufacturing equipment to manufacture positive and negative electrodes. . The equipment is expensive and the manufacturing process is complicated, so the cost of solar cells is relatively high. [0003] In recent years, although new technologies for manufacturing silicon solar cells h...

AI Technical Summary

Problems solved by technology

The equipment is expensive and the manufacturing process is complicated, so the cost of solar cells is relatively high

[0003] In recent years, although new technologies for manufacturing silicon solar cells have emerged, such as ion implantation technology, plasma etching texturing technology, selective emitter technology, copper grid line technology, ultra-thin silicon wafer technology, back junction and back contact technology , heterojunction technology, etc., but these technologies did not significantly reduce costs while improving efficiency, and some technologies increased expensive equipment and complicated processes

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