TEXTURING AGENT COMPOSITIONS OF SINGLE CRYSTALLINE SILICON WAFERS FOR SOLAR CELL AND TEXTURING METHOD USING THE SAME

摘要

PURPOSE: A texturing agent composition for a single crystal silicon wafer for a solar cell and a texturing method using the same are provided to eliminate hydrogen bubbles which stick on the surface of the silicon wafer by containing silicic alkali metal salts and water-soluble resin with a controllable etching rate. CONSTITUTION: A texturing agent composition comprises silicic alkali metal salts and water-soluble resin. The silicic alkali metal salts is formed of potassium silicate, lithium silicate, and tetra sodium silicate. The silicic alkali metal salts is composed of hexasodium disilicate group and a disodium silicate group. A potassium hydroxide solution of 45% and texturing agent are mixed in ion exchanged water(S1). The mixture is vertically used to etch and texture the surface of a wafer(S2). [Reference numerals] (S1) Step of mixing a potassium hydroxide solution and a texturing agent with ion exchanged water; (S2) Step of texturing the mixture by vertically etching the mixture on the surface of a single crystal silicon wafer