Erdalkalialuminoborosilicatglas and its uses

The invention relates to low-alkali or alkali-free Erdalkalialuminoborosilicatglaser having a composition (in wt .-% on oxide) SiO¶2¶> 49-65; B¶2¶O¶3¶ 0.5-4.5; Al¶2¶O¶3¶> 10-23; MgO> 2.7 to 7; CaO 0.5-10; SrO> 15.5 to 22; BaO 0.5-7; MgO + CaO + SrO + BaO> 20-35; SnO¶2¶ 0-2; ZrO¶2¶ 0-2; TiO¶2¶ 0-2; CeO¶2¶ 0-1.5; ZnO 0-1; Na¶2¶O 0-2; K¶2¶O 0-2; with Na¶2¶O + K¶2¶O 0-3. DOLLAR A The glasses are particularly suitable for use as substrates in thin film photovoltaics and as lamp glasses.