Patent ID: 9105801
Filing Date: 2015-08-11
Classification: C23C,H01L,Y02E

Abstract:
1. A method for fabricating a Cu—In—Ga—Se film solar cell, comprising: a) fabricating a molybdenum back electrode on a substrate; b) fabricating a Cu—In—Ga—Se absorbing layer on the molybdenum back electrode by a multi-step sputtering, wherein the Cu—In—Ga—Se absorbing layer is fabricated by a sputter equipment, comprising: an input stage, an input chamber, a first to N c) performing an annealing for the Cu—In—Ga—Se absorbing layer in a rapid heating mode in the unloading chamber under a temperature of 400-600° C. for 55-90 seconds so that a Ga concentration in the Cu—In—Ga—Se absorbing layer has a gradient, the Ga concentration has a maximum on a surface of the Cu—In—Ga—Se absorbing layer contacting with the molybdenum back electrode and has a minimum on the other surface of the Cu—In—Ga—Se absorbing layer; d) fabricating an In e) fabricating an intrinsic zinc oxide high impedance layer with a thickness of 0.1-0.5 μm on the In f) fabricating an indium tin oxide film low impedance layer with a thickness of 0.3-0.8 μm on the intrinsic zinc oxide high impedance layer; g) fabricating an aluminum electrode on the indium tin oxide film low impedance layer.