Halogenide containing glasses in metallization pastes for silicon solar cells

In general, the invention relates to a paste comprising: (i) silver particles; (ii) a particulate lead-silicate glass comprising (iia) at least one oxide of silicon; (iib) at least one oxide of lead; (iic) at least one chloride; (iid) optionally at least one further oxide being different from components (iia) and (iib); (iii) an organic vehicle. The invention also relates to a solar cell precursor, to a process for the preparation of a solar cell, to a solar cell obtainable by this process, to a module comprising such a solar cell and to the use of a particulate lead-silicate glass as a component in a silver paste that can be used for the formation of an electrode.