Solar Cell Pastes

The HeraSol compositions are a series of screen printable front and back side silver conductors for crystalline solar cells. Our compositions are all cadmium-free and tailored solutions for either SiNx or TiOx anti-reflective coatings. Lead free formulations are also available.

All HeraSol silver conductor pastes are co-fireable with commercial back side Ag/Al pastes.

With our new SOL 953 silver paste we present our 3rd Generation Front Side Silver which is formulated for lightly doped emitter and optimized for high throughput processing. SOL 953 provides excellent aspect ratio and fine line resolution for advanced cell designs.

For back side solder applications, Heraeus is introducing the new lead-free silver paste SOL 230 with significantly lower material consumption due to high coverage and excellent initial and soldered aged adhesion.

Additional formulations are available which allows the use of our materials as inks or suspensions which can applied by ink jetting, decals or others used in manufacturing silicon based solar cells.

The Photovoltaics Business Unit of W. C. Heraeus has established PV Application Centers in Germany, the United States and China to share experience with our customers and to gather new insights by experiments. Over 40 years of experience with Thick Film materials and solid technical theory flow together in our Application Centers to offer the optimum conditions and capabilities to solve even the most difficult of problems.