Patent ID: 8497220

Claim:
A glass substrate for a solar cell, which has a glass composition comprising, in terms of mass %, 50 to 80% of SiO 2 , 5 to 20% of Al 2 O 3 , 0 to 20% of B 2 O 3 , 0 to 20% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 20% of BaO, 0.001 to 2% of SnO 2 , 0 to 0.1% of Sb 2 O 3 , and 1 to 500 ppm of Fe 2 O 3 , has a mass ratio SnO 2 /(Fe 2 O 3 +SnO 2 ) of 0.95 or more, and has a difference between transmittances at a wavelength of 400 nm before and after irradiation with ultraviolet ray of 2% or less.