TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The TCO layer is the transparent conductive oxide membrane. The front electrode TCO layer is the doped tin dioxide membrane or zinc oxide membrane. The back electrode TCO layer is the doped zinc oxide layer. The p layer, i layer and n layer are made up of non-crystalline silicon, non-crystalline silicon germanium, crystalline silicon or crystalline silicon germanium. Preferred Method: The reducing reflection coating is prepared in sol-gel manner by (i) cleaning with an electronic detergent, flushing a glass substrate with deionized water and blowing by a highly pure nitrogen; (ii) taking tetra ethyl orthosilicate, isopropanol and deionized water as raw materials and hydrochloric acid and ammonium hydroxide as catalysts to prepare a silicon sol; and (iii) coating the silicon sol on a photovoltaic glass in screen printing way and curing to obtain the photovoltaic glass with the reducing reflection coating. The thickness of silicon dioxide reducing reflection coating is 400-1000 nm and refractive index is 1.1-1.4. The silicon dioxide reducing reflection coating is prepared by (i) adding a mixed solution of water, hydrochloric acid and isopropanol to the mixed solution of tetra ethyl orthosilicate and isopropanol by quickly stirring with a magnetic stirrer, where the molar ratio of tetra ethyl orthosilicate to isopropanol to water to hydrochloric acid is 1:x1:y1:z1, where x1 is equal to 1-5, y1 is equal to 0-2 and z1 is equal to 0.001-0.01; (ii) keeping aside the solution for 2-4 hours; (iii) adding the mixed solution of water, ammonium hydroxide and isopropanol to the solution to form a silicon sol, where the molar ratio of the tetra ethyl orthosilicate to isopropanol to water to hydrochloric acid to ammonium hydroxide is 1:x2:y2:z1:w1, where x2 is equal to kx1, w1 is equal to kz1 (k is the integer more than 0) and y2 is equal to 2-4, regulating the value of y1 and y2 to regulate the property of the sol to obtain the membrane with different refractive index; and (iv) coating the silicon sol on the photovoltaic glass in screen printing way and curing for 10-300 minutes at 200-500 degrees C. The area of the battery is more than 100 mmx 100 mm.