| abstract |
Aluminosilicate and boroaluminosilicate glasses containing sodium are described; the glasses can be used as substrates for photovoltaic devices, for example, thin film photovoltaic devices such as CIGS photovoltaic devices; these glasses can be characterized because they have a deformation point = 540 ° C, thermal expansion coefficient of 6.5 ppm / ° C at 9.5 ppm / ° C and liquid viscosity greater than 50,000 Poise; therefore they are ideal to be formed in sheet form by the fusion process. |