THIN FILM SOLAR CELL AND METHOD FOR MANUFACTURING SAME

• Main Author: FUJIKAKE SHINJI
• Format: Patent
• Language: English
• Published: 21.06.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; SOLDERING OR UNSOLDERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WELDING; WORKING BY LASER BEAM

A method is disclosed for manufacturing a thin film substrate solar cell that has a metal electrode, a photoelectric conversion layer, and a transparent electrode stacked in this order on a substrate, the photoelectric conversion layer combining, in a thickness direction, two or more n, i, p junctions with non-single crystal silicon as main materials thereof. A top cell which is the photoelectric conversion layer on the side of the transparent electrode and another cell of one or more layers on the side of the metal electrode relative to the top cell are provided. The method includes a step of simultaneously removing at least the two or more photoelectric conversion layers and the transparent electrode using a laser with a wavelength having selective sensitivity with respect to the top cell, from the side of the transparent electrode, followed by blowing-away.