Solar cell emitting electrode corroding method
A technology for solar cells and emitters, applied in circuits, electrical components, climate sustainability, etc., can solve the problems of difficult control and repetition of corrosion, poor uniformity of sheet resistance, inconsistent emitter depth, etc., to improve wettability, easy Repeat, improve the effect of uniformity
Inactive Publication Date: 2012-08-15
SUN YAT SEN UNIV
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The invention discloses a treatment process of emitting electrodes of solar cells, and particularly relates to a solar cell emitting electrode corroding method. The method comprises steps that a mixing solution of hydrofluoric acid and nitric acid is used as basic corroding liquid; at least one or any combination of nitrous acid, nitrite, sulfuric acid, sulfuric acid or phosphate is added; factors of proportion, temperature, time and adding amount of additives of the corroding liquid are optimized; a high impurity concentration area on the surface of the emitting electrode is eliminated uniformly and controllably; and afterwards the emitting electrode is washed so as to manufacture the solar cell with low surface impurity concentration, or a selective emitting electrode solar cell in combination with a printing process of masking.
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