The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2015
Filed:
Jul. 27, 2012
Jörg Hinrich Fechner, Weiden, DE;
Christof Kass, Tirschenreuth, DE;
Franz Ott, Konnersreuth, DE;
Schott AG, Mainz, DE;
Abstract
A photovoltaic cell, for example a thin-film photovoltaic cell, having a substrate glass made of aluminosilicate glass, has a glass composition which has SiOand AlOas well as the alkali metal oxide NaO and the alkaline earth oxides CaO, MgO, and BaO, and optionally further components. The glass composition includes 10 to 16 wt.-% NaO, >0 to <5 wt.-% CaO, and >1 to 10 wt.-% BaO, and the ratio of CaO:MgO is in the range of 0.5 to 1.7. The aluminosilicate glass used is crystallization stable because of the selected quotient of CaO/MgO and has a transformation temperature >580° C. and a processing temperature <1200° C. Therefore, it represents a more thermally stable alternative to soda-lime glass. The aluminosilicate glass is used as a substrate glass, superstrate glass, and/or cover glass for a photovoltaic cells, for example for thin-film photovoltaic cells, in particular those based on semiconductor composite material, such as CdTe, CIS, or CIGS.