| V2O5 및 TeO2 함유 유리를 이용한 염료감응형 태양전지 패널의 레이저 봉착 |
| 조성진, 이경호 |
| 순천향대학교 디스플레이신소재공학과 |
| Laser Sealing of Dye-Sensitized Solar Cell Panels Using V2O5 and TeO2 Contained Glass |
| Sung Jin Cho, Kyoung Ho Lee |
| Department of Display Materials Engineering, Soonchunhayng University |
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| ABSTRACT |
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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 $V_2O_5$-based glasses with various amounts of $TeO_2$ substitution. The latter was intended to increase the lifetime of the solar cells. Substitution of $V_2O_5$ by $TeO_2$ 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 (${Delta}{alpha}$) between the glass frit and the substrate could be controlled within less than ${pm}5%$ by addition of 10 wt% of ${beta}$-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% ${beta}$-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. |
| Key words:
Laser sealing, Dye-sensitized solar cell, $V_2O_5$-based glass frit, $TeO_2$ substitution |
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