Selectiveness of laser processing due to energy coupling localization: case of thin film solar cell scribing

Račiukaitis, Gediminas; Grubinskas, S.; Gečys, Paulius; Gedvilas, Mindaugas

doi:10.1007/s00339-012-7206-x

Cited by 16 publications

(11 citation statements)

References 18 publications

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“…Table 1 lists the numerical simulation parameters from literature [30,31]. The initial and boundary conditions of the electron and lattice subsystems were considered as follows.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Hermann et al [21] applied a theoretical method to compare the fine structural characteristics of P2 and P3 layers that were scribed using nanosecond-and femtosecond-pulsed lasers. Račiukaitis et al [22] also applied a numerical method to verify the selectiveness of picosecond laser processing for ablating complex CIGS thin-film structures with low thermal impact. The simulation results reported by previous studies on damage-free laser processes for fabricating thin-film CIGS solar cells have failed to elucidate the mechanisms or melting problems involved in surface-pattern techniques, even where picosecond and femtosecond lasers are used.…”

Section: Introductionmentioning

confidence: 99%

“…C l (J/m 3 /K) 2.65 Â 10 6[31] k e0 (J/m/K/s) 318[30] G (J/m 3 /K/s) 2.5 Â 1017 2.1 Â 1016 2.1 Â 10 16 R (À) (a) Measured result of three-dimensional intensity distribution of ultrafastlaser beam shows the intensity of the ultrafast laser exhibited a Gaussian distribution. (b) Schematic of laser scanning route on the surface of thin film.…”

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confidence: 99%

See 2 more Smart Citations

Multilayered structuring of thin-film PV modules by ultrafast laser ablation

Chen

Chang

2015

Microelectronic Engineering

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“…Table 1 lists the numerical simulation parameters from literature [30,31]. The initial and boundary conditions of the electron and lattice subsystems were considered as follows.…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multilayered structuring of thin-film PV modules by ultrafast laser ablation

Chen

Chang

2015

Microelectronic Engineering

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“…As a result, industrial processes based on femtosecond and picosecond laser pulse durations are becoming increasingly widespread. Manufacturing applications include the very precise drilling of holes for fuel-injection nozzles [4], the dicing of silicon wafers [5], the scribing of thin film solar cells [6] and the fabrication of volume Bragg gratings in transparent bulk materials [7]. Early ultrashort-pulse laser systems suffered from a comparatively low processing speed which slowed down their uptake in industry [3].…”

Section: Introductionmentioning

confidence: 99%

Complete wavefront and polarization control for ultrashort-pulse laser microprocessing

Allegre¹,

Yang²,

Perrie³

et al. 2013

Opt. Express

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We report on new developments in wavefront and polarization control for ultrashort-pulse laser microprocessing. We use two Spatial Light Modulators in combination to structure the optical fields of a picosecond-pulse laser beam, producing vortex wavefronts and radial or azimuthal polarization states. We also carry out the first demonstration of multiple first-order beams with vortex wavefronts and radial or azimuthal polarization states, produced using Computer Generated Holograms. The beams produced are used to nano-structure a highly polished metal surface. Laser Induced Periodic Surface Structures are observed and used to directly verify the state of polarization in the focal plane and help to characterize the optical properties of the setup.

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“…In the case of the third isolating scribe (P3), two main scribing approaches were reported in the literature – ablation of the full layer stack to expose the molybdenum back-contact51011, and the removal of the front-contact only91112. These two methods can be addressed as the laser scribe P3 “type 1” and “type 2”, respectively.…”

mentioning

confidence: 99%

CIGS thin-film solar module processing: case of high-speed laser scribing

Gečys

Markauskas

Nishiwaki

et al. 2017

Sci Rep

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In this paper, we investigate the laser processing of the CIGS thin-film solar cells in the case of the high-speed regime. The modern ultra-short pulsed laser was used exhibiting the pulse repetition rate of 1 MHz. Two main P3 scribing approaches were investigated – ablation of the full layer stack to expose the molybdenum back-contact, and removal of the front-contact only. The scribe quality was evaluated by SEM together with EDS spectrometer followed by electrical measurements. We also modelled the electrical behavior of a device at the mini-module scale taking into account the laser-induced damage. We demonstrated, that high-speed process at high laser pulse repetition rate induced thermal damage to the cell. However, the top-contact layer lift-off processing enabled us to reach 1.7 m/s scribing speed with a minimal device degradation. Also, we demonstrated the P3 processing in the ultra-high speed regime, where the scribing speed of 50 m/s was obtained. Finally, selected laser processes were tested in the case of mini-module scribing. Overall, we conclude, that the top-contact layer lift-off processing is the only reliable solution for high-speed P3 laser scribing, which can be implemented in the future terawatt-scale photovoltaic production facilities.

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Selectiveness of laser processing due to energy coupling localization: case of thin film solar cell scribing

Cited by 16 publications

References 18 publications

Multilayered structuring of thin-film PV modules by ultrafast laser ablation

Multilayered structuring of thin-film PV modules by ultrafast laser ablation

Complete wavefront and polarization control for ultrashort-pulse laser microprocessing

CIGS thin-film solar module processing: case of high-speed laser scribing

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