Optimization of laser scribing for thin-film PV modules. Final technical progress report, 12 April 1995--11 October 1997

Technical Report · Mon Jun 01 00:00:00 EDT 1998

DOI:https://doi.org/10.2172/654090· OSTI ID:654090

Compaan, A D; Matulionis, I; Nakade, S ^[1]

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1. Univ. of Toledo, OH (United States)

This report covers the work done by the University of Toledo under this subcontract. Researchers determined the threshold power densities for the onset of ablation from thin films of CdTe, CuInSe{sub 2}, SnO{sub 2}:F, ZnO:Al, gold, and molybdenum for 12 different wavelength laser systems using wide variations of laser pulse durations. Optimum energy density for the most efficient removal of material during scribing strongly depends on the wavelength of the laser and, to a smaller extent, on the pulse duration. The optimum energy densities range from 0.5 J/sq cm for the 532-nm, 8-nsec YAG pulse on CdTe to 0.2 J/sq cm for the excimer laser at 308 nm on CIS. Poor scribing of CdTe was seen with the 1064-nm beam, ZnO was scribed poorly by all lasers except for the excimer laser. Excellent scribe profiles were observed with the 308-nm excimer lasers on all materials including ZnO.

• Research Organization: National Renewable Energy Lab., Golden, CO (United States); Univ. of Toledo, OH (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
• DOE Contract Number: AC36-83CH10093
• OSTI ID: 654090
• Report Number(s): NREL/SR--520-24842; ON: DE98005785
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ABLATION
CADMIUM TELLURIDE SOLAR CELLS
COPPER SELENIDE SOLAR CELLS
GOLD
INDIUM SELENIDE SOLAR CELLS
LASER BEAM MACHINING
LASER SCRIBING
MOLYBDENUM
PHOTOVOLTAIC CELLS
PHOTOVOLTAICS
PROGRESS REPORT
THIN-FILM PV MODULES
TIN OXIDES
ZINC OXIDES