Title

Micrometric solar-cell coating adhesion characterization by sub-picosecond laser driven shock

Micrometric solar-cell coating adhesion characterization by sub-picosecond laser driven shock

Authorship

Cuq-Lelandais, Jean-Paul; Broussillou, Cédric; Berthe, Laurent; Boustie, Michel; Jeandin, Michel; Lescoute, Emilien; Rességuier, Thibaut De; Combis, Patrick; Soulard, Laurent

Cuq-Lelandais, Jean-Paul

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Broussillou, Cédric

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Berthe, Laurent

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Boustie, Michel

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Jeandin, Michel

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Lescoute, Emilien

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Rességuier, Thibaut De

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Combis, Patrick

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Soulard, Laurent

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DOI

10.5151/2594-5327-34545

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Abstract

Shock wave propagation and the spallation within materials induced by laser shock have been investigated for roughly three decades with a few nanosecond characteristic durations. With the latest evolution in laser technologies, one can access shorter regimes in durations, going below the picosecond. This kind of irradiation provides an ultra-short shock wave and also a thin spall ejection, about a micron thick. One possible application for this regime is an adaptation of the Laser Shock Adhesion Test (LASAT) applied for micrometric coatings. which are frequently found in the industry. LASAT experiments were performed on the LULI 100TW facility on CuInSe2 solar-cell based films to determine the debonding threshold by inducing a dynamic tension state at the interface, an important parameter for cell production and that may have an influence on the cell lifetime. Experimental post-test results on recovered samples inform about the interface rupture mechanisms. They are completed by a numerical analysis to understand the debonding processes induced by shock waves propagation and to determine the interface strengths.

Shock wave propagation and the spallation within materials induced by laser shock have been investigated for roughly three decades with a few nanosecond characteristic durations. With the latest evolution in laser technologies, one can access shorter regimes in durations, going below the picosecond. This kind of irradiation provides an ultra-short shock wave and also a thin spall ejection, about a micron thick. One possible application for this regime is an adaptation of the Laser Shock Adhesion Test (LASAT) applied for micrometric coatings. which are frequently found in the industry. LASAT experiments were performed on the LULI 100TW facility on CuInSe2 solar-cell based films to determine the debonding threshold by inducing a dynamic tension state at the interface, an important parameter for cell production and that may have an influence on the cell lifetime. Experimental post-test results on recovered samples inform about the interface rupture mechanisms. They are completed by a numerical analysis to understand the debonding processes induced by shock waves propagation and to determine the interface strengths.

Keywords

Laser driven shocks, Femtosecond laser, Adhesion test, micrometric coatings and solar-cells.

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