Monocrystaline silicon solar battery texture etching tank

Abstract

A single-crystal silicon solar-energy battery velvet corrosion groove comprises a groove, a heating pipe, a support plate, and a silicon slice carrier, wherein the left and right ends of the support plate are respectively provided with a left curt an a right cut, the support plate is supported in the groove to form a chamber with the bottom of the groove, the heating pipe is mounted on the inner wall of the groove, above the left cut or the right cut, the silicon slice carrier is arranged on the support plate. When the corrosion groove is heated, the corrosion liquid will flow from the cut of the heating pipe vertically with the carrier, to lift up along the cuts of the support plate, to enter into the chamber under the support plate, to flow up along the cut near the heating pipe to be heated, as one circulation. Therefore, the surface of whole silicon slice is heated uniformly, the corrosion liquid flows uniformly, with uniform corrosion speed and uniform velvet structure.

Description

Technical field: [0001] The invention relates to a crystalline silicon solar cell, in particular to a textured etching groove of a monocrystalline silicon solar cell. Background technique: [0002] The light trapping effect on the surface of monocrystalline silicon solar cells is directly related to the uniformity of the "pyramid" texture of the solar cells. At present, the texture of monocrystalline silicon solar cells is obtained by etching the "pyramid" texture. The common method now is to place the silicon wafer vertically in the silicon wafer carrier, and then place the silicon wafer carrier on the In the corrosion tank filled with corrosive liquid, the corrosive liquid is mixed with sodium hydroxide or potassium hydroxide, water and defoamer. At present, the monocrystalline silicon solar cell suede etching tank is composed of a tank body, a heating tube, a supporting plate, and a silicon chip carrier. The heating tube is arranged at the bottom of the tank body, and th...

AI Technical Summary

Problems solved by technology

Since there are several evenly distributed seepage holes on the support plate, the corrosion liquid flows fast at the positions with seepage holes, and the corrosion liquid flows slowly at the positions without seepage holes, so the flow of the corrosion liquid at the bottom of the silicon wafer is not uniform, The surface of the silicon wafer is corroded unevenly, and the obtained suede surface is uneven, which is difficult to meet people's expected requirements.

Images