NOVELTY - A paste composition comprises a solid portion and a vehicle system, the solid portion comprising a conductive metal component at 70 wt.% or more and 99.5 wt.% or less of the solid portion and a glass binder comprising one or more glass frits at 0.5 wt.% or more and 30 wt.% or less of the solid portion, and the vehicle system comprising an organometallic compound comprising zinc.    USE - The paste composition and the methods are useful for forming a contact on a silicon solar cell; and for making a solar cell contact (all claimed).    ADVANTAGE - The paste composition is highly improved and can be efficiently used to form contacts in solar cells or other related components.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a method of making the paste composition, comprising: combining a conductive metal component, a glass binder, and a vehicle system comprising a vehicle and an organometallic compound comprising zinc; and dispersing the conductive metal component and the glass binder in the vehicle system;    (2) a contact formed on a silicon solar cell, the contact formed by firing a paste composition comprising a solid portion and a vehicle system, the solid portion comprising a conductive metal component at 70 wt.% or more and 99.5 wt.% or less of the solid portion and a glass binder comprising one or more glass frits at 0.5 wt.% or more and 30 wt.% or less of the solid portion, and a vehicle system comprising an organometallic compound comprising zinc; and    (3) a method of making a solar cell contact, comprising: applying a paste composition to a silicon substrate, the paste comprising a solid portion and a vehicle system, the solid portion comprising a conductive metal component at 70 wt.% or more and 99.5 wt.% or less of the solid portion and a glass binder comprising one or more glass frits at 0.5 wt.% or more and 30 wt.% or less of the solid portion, and the vehicle system comprising an organometallic compound comprising zinc; and heating the paste to sinter the conductive metal component and fuse the glass frit.