Reliable screen-printed contacts on silicon solar cells
Abstract
A screen-printing process for phi 100 mm silicon solar cells is examined. The adherence of silver to silicon is obtained with a glass binder designed to be steam boiling water (SBW) resistant, and the dissolution of the silicon surface by the glass is analyzed. It is found that when the firing temperature of the screen-printed conductors increases, the mechanical and SBW resistance increase; and since the junction depth has to be increased at the same time, the cell output power decreases. A 0.5 micron junction depth and a firing temperature of 680 C appear to be the best trade off, leading to omega 100 mm cells with screen-printed contacts exhibiting good electrical performances, a 300 g standard tensile strength, and over 500 hours SBW lifetime.
- Publication:
-
3rd Photovoltaic Solar Energy Conference
- Pub Date:
- 1981
- Bibcode:
- 1981pvse.conf..679M
- Keywords:
-
- Electric Contacts;
- Metallizing;
- Reliability Engineering;
- Silicon Junctions;
- Solar Cells;
- Volt-Ampere Characteristics;
- Binders (Materials);
- Energy Technology;
- Firing (Igniting);
- Low Cost;
- Photovoltaic Conversion;
- Production Costs;
- Production Engineering;
- Temperature Effects;
- Tensile Strength;
- Electronics and Electrical Engineering