Pump-Probe Investigations on the Laser Ablation of CIS Thin Film Solar Cells

Domke, Matthias; Heise, G.; Richter, Isabel; Sarrach, Sebastian; Huber, Heinz P.

doi:10.1016/j.phpro.2011.03.149

Cited by 12 publications

(3 citation statements)

References 12 publications

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“…The P1 scribe line is intended to electrically separate neighboring cells or regions, at the same time the widths of the cells are determined. The P1 patterning process has been investigated by several groups who analyzed the ablation behavior of differently deposited Mo layers on glass substrates [19][20][21]. It was shown that by applying glass-side patterning (cf.…”

Section: P1 Patterningmentioning

confidence: 99%

Laser-based monolithic series interconnection of two-terminal perovskite-CIGSe tandem solar cells: determination of the optimal scribe line properties

Schultz

Basulto²,

Otto³

et al. 2023

EPJ Photovolt.

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To achieve a monolithic series interconnection of tandem solar cell devices consisting of a perovskite top cell and a CIGSe bottom cell, a two-terminal interconnection scheme is introduced that includes an additional, fourth patterning step, the so-called iso-cut, which separates the window layer stack between the two solar cells. The implementation of this interconnection scheme requires a process development for a total of four structuring steps, which was achieved by systematically varying the laser parameters. Based on a detailed characterization of the individual scribe line properties with respect to their scribe line depth, morphology, electrical functionality, chemical composition and their influence on adjacent and underlying layers, the optimal patterning parameters and suitable process windows were derived for each step, which is a prerequisite for a loss-free monolithic series interconnection in a tandem module.

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Section: P1 Patterningmentioning

confidence: 99%

Laser-based monolithic series interconnection of two-terminal perovskite-CIGSe tandem solar cells: determination of the optimal scribe line properties

Schultz

Basulto²,

Otto³

et al. 2023

EPJ Photovolt.

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“…Thus, the temporal resolution depends on the jitter and pulse duration of the probe laser but the maximum delay time is unlimited. *matthias.domke@hm.edu; phone 49 89 1265-3677; http://www.fb06.fh-muenchen.de/lhm We already presented pump-probe microscopy investigations of the direct induced ablation of Mo films with a 10 pslaser up to maximum delay times of 4 ns [21]. It was shown that the transient behaviour of the ablation process is not finished within 4 ns.…”

Section: Introductionmentioning

confidence: 99%

Time and space resolved microscopy of induced ablation with ultra-short laser pulses

et al. 2012

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Laser lift-off processes have been observed during structuring CIS thin film solar cells with ultra-short laser pulses, if a Mo film on glass is irradiated from the glass substrate side. To investigate the underlying physical effects, ultrafast pump-probe microscopy is used for time-and space resolved investigations. The setup utilizes a 660 fs-laser pulse at a wavelength of 1053 nm that is split up into a pump and a probe pulse. The pump pulse ablates the thin film, while the frequency doubled probe pulse illuminates the ablation area after an optically defined delay time of up to 4 ns. For longer delay times, a second electronically triggered 600 ps-laser is used for probing. Thus, the complete ultra fast pulse initiated ablation process can be observed in a delay time range from femtoseconds to microseconds.First experiments on the directly induced ablation of molybdenum films from the glass substrate side show that mechanical deformation is initiated at about 400 ps after the impact of the pump laser pulse. The deformation continues until approximately 15 ns, then a Mo disk shears and lifts-off with a velocity of above 70 m/s free from thermal effects.

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“…Laser direct scribing for the patterning of ZnO, copper indium diselenide (CIS), Mo film used in thin film solar cells has been studied for several years [3][4][5][6][7][8] and is well established in industry. The advantages of this method are that it can improve productivity, reduce the cost of production and decrease the chemical pollution of the environment.…”

mentioning

confidence: 99%

Selective patterning and scribing of Ti thin film on glass substrate by 532 nm picosecond laser

2012

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In this paper, the feasibility of Ti film coated on glass substrate scribed via a 532 nm picosecond laser is investigated. Laser irradiations from the film side and from the transparent substrate side are performed for comparison. Optical microscopy, SEM, surface stylus and contact resistance measurement reveal that the Ti film can be completely removed with no damage to the glass substrate, using optimized process parameters. The complete removal threshold for the film for front-side scribing is found at 120 mJ/cm 2 , while the minimum laser fluence for complete scribing is 70 mJ/cm 2 in the case of back-side scribing. The lines scribed from the front side exhibit obvious thermal effects such as heat affected zones, burr and micro cracks. Backside scribing exhibits non-thermal behavior, which also can increase the process speed for the scribing of a Ti film on glass to 1000 mm/s. This makes the back-side laser scribing of Ti film a promising technique.

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Pump-Probe Investigations on the Laser Ablation of CIS Thin Film Solar Cells

Cited by 12 publications

References 12 publications

Laser-based monolithic series interconnection of two-terminal perovskite-CIGSe tandem solar cells: determination of the optimal scribe line properties

Laser-based monolithic series interconnection of two-terminal perovskite-CIGSe tandem solar cells: determination of the optimal scribe line properties

Time and space resolved microscopy of induced ablation with ultra-short laser pulses

Selective patterning and scribing of Ti thin film on glass substrate by 532 nm picosecond laser

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