Additional Study on the Laser Sealing of Dye-Sensitized Solar-Cell-Panels Using V2O5 and TeO2 Containing Glass

Abstract

The effective glass frit composition used to absorb laser energy and to seal commercial dye-sensitized solar cell panel substrates has been previously developed using V 2 O 5-TeO 2-based glass with 10 wt% β-eucryptite as a CTE controlling filler. The optimum sealing conditions are provided using a 3 mm beam, a laser power of 40 watt, a scan speed of 300 mm/s, and 200 irradiation cycles. In this study, the feasibility of the developed glass frit is investigated in terms of the sealing strength and chemical durability against the commercial iodide/triiodide electrolyte solution and fluorine-doped tin oxide (FTO) electrode in order to increase the solar cell lifetime. The sealing strength of the laser-sealed V 2 O 5-TeO 2-based glass frit is 20.5 ± 1.7 MPa, which is higher than those of thermally sealed glass frit and other reported glass frit. Furthermore, the developed glass frit is chemically stable against electrolyte solutions. The glass frit constituents are not leached out from the glass after soaking in the electrolyte solution for up to three months. During the laser sealing, the glass frit does not react with the FTO electrode; thus, the resistivity of the FTO electrode beneath the laser-sealed area remains the same.

The Tuning Capability of CuO and Na2CO3 Dopant on Physical Properties for Laser Sealing Using Fiber Types of Sealant

“…It was found that the maximum value of the breaking force was reached after a certain displacement between upper FTO substrate and lower FTO substrate was formed. In the previous studies, it was reported that sealing strength using screen printed sealant was observed in the range of 12.3-20.5 MPa [3,33]. Compared with values obtained from previous studies above, a sealing strength of 41 MPa seemed to be as strong a candidate as laser sealant.…”

Processing technologies for sealing glasses and glass‐ceramics

“…Some examples of laser welded substrates through glass sealants are summarized in Table . Substrates of different chemical nature (metals, glasses, ceramics) were joined through glass sealants by this technique . Some of these laser welded joints are employed to seal solar cells …”