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Effective glass frit compositions enabled to absorb laser energy, and to seal a commercial dye-sensitized solar-cell-panel substrate were developed by using V₂O 5 -based glasses with various amounts of TeO₂ substitution. The latter was intended to increase the lifetime of the solar cells. Substitution of V₂O 5 by TeO₂ provided a strong network structure for the glasses via the formation of tetrahedral pyramids in the glass, and changed the various glass properties, such as glass transition temperature (T g ), dilatometric softening point (T d ), crystallization temperature, coefficient of thermal expansion (CTE), and glass flowage without any detrimental effect on the laser absorption property of the glasses. The thermal expansion mismatch (Δα) between the glass frit and the substrate could be controlled within less than ±5% by addition of 10 wt% of β-eucryptite. An 810 nm diode laser was used for the sealing test. The laser sealing test revealed that the VZBT20 glass frit with 10 wt% β-eucryptite was successfully sealed the substrates without interfacial cracks and pores. The optimum sealing conditions were provided by a beam size of 3 mm, laser power of 40 watt, scan speed of 300 mm/s, and 200 irradiation cycles.

Laser Sealing of Dye-Sensitized Solar Cell Panels Using V2O5and TeO2Contained Glass

Laser Sealing of Dye-Sensitized Solar Cell Panels Using V₂O₅and TeO₂Contained Glass