Thin film removal mechanisms in ns-laser processing of photovoltaic materials

Bovatsek, Jim; Tamhankar, Ashwini; Patel, Raj; Bulgakova, Nadezhda M.; Bonse, Jörn

doi:10.1016/j.tsf.2009.10.135

Cited by 134 publications

(75 citation statements)

References 31 publications

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“…[32] Generally, laser patterning in thin-film PV consists of three subsequent laser processes and thus, the process of laser-induced interconnection of solar cells in modules is called the P1-P2-P3 process. [31,[33][34][35][36] This approach permits the creation of a monolithic series-interconnected module. Through the P1-P2-P3 laser processing selective layer removal can be realized where required.…”

Section: Index Terms-perovskites Solar Cells Laser Processing Solarmentioning

confidence: 99%

Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio

Palma

Matteocci

Agresti

et al. 2017

IEEE J. Photovoltaics

124

129

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Small area hybrid organometal halide perovskite\ud based solar cells reached performances comparable to the multicrystalline\ud silicon wafer cells. However, industrial applications\ud require the scaling-up of devices to module-size. Here, we report\ud the first fully laser-processed large area (14.5 cm2) perovskite solar\ud module with an aperture ratio of 95% and a power conversion\ud efficiency of 9.3%. To obtain this result, we carried out thorough\ud analyses and optimization of three laser processing steps required\ud to realize the serial interconnection of various cells. By analyzing\ud the statistics of the fabricated modules, we show that the error\ud committed over the projected interconnection dimensions is sufficiently\ud lowto permit even higher aperture ratios without additional\ud efforts

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Section: Index Terms-perovskites Solar Cells Laser Processing Solarmentioning

confidence: 99%

Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio

Palma

Matteocci

Agresti

et al. 2017

IEEE J. Photovoltaics

124

129

View full text Add to dashboard Cite

show abstract

“…As was shown by numerical simulations of molten metal ablation based on the thermal model [60], laser-induced removal of material is rather negligible as compared to its protrusion during a single laser pulse. Due to the contact with the laser-heated metal, the film heats up and either thermally decomposes when reaching the decomposition temperature or, more probable, fractures under high thermal stresses [83]. The metal layer within the irradiation spot thermally expands, partially vaporizes, and protrudes through the hole produced in the oxide shell by the laser.…”

Section: Role Of Plasma Chemistry: "Microtower" Growth Upon Ablation mentioning

confidence: 99%

Impacts of Ambient and Ablation Plasmas on Short- and Ultrashort-Pulse Laser Processing of Surfaces

et al. 2014

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Abstract:In spite of the fact that more than five decades have passed since the invention of laser, some topics of laser-matter interaction still remain incompletely studied. One of such topics is plasma impact on the overall phenomenon of the interaction and its particular OPEN ACCESSMicromachines 2014, 5 1345 features, including influence of the laser-excited plasma re-radiation, back flux of energetic plasma species, and massive material redeposition, on the surface quality and processing efficiency. In this paper, we analyze different plasma aspects, which go beyond a simple consideration of the well-known effect of plasma shielding of laser radiation. The following effects are considered: ambient gas ionization above the target on material processing with formation of a "plasma pipe"; back heating of the target by both laser-driven ambient and ablation plasmas through conductive and radiative heat transfer; plasma chemical effects on surface processing including microstructure growth on liquid metals; complicated dynamics of the ablation plasma flow interacting with an ambient gas that can result in substantial redeposition of material around the ablation spot. Together with a review summarizing our main to-date achievements and outlining research directions, we present new results underlining importance of laser plasma dynamics and photoionization of the gas environment upon laser processing of materials.

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“…All the laser scribes were carried out by back scribing (i.e., through the glass side) [13,14]. Afterward, the images desired to be shown on the PV module were edited using computer software to appear as vertical stripes and each image was horizontally shifted.…”

Section: Methodsmentioning

confidence: 99%

Design and Production of Animated Image Photovoltaic Modules

Hsu

et al. 2017

Energies

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This paper develops fifth-generation-sized silicon thin-film tandem photovoltaic (PV) modules with animated images. Front PV cell stripes are created using a laser scribing technique, and specially edited and shifted images are printed onto the back glass. After encapsulating the front PV module with the back glass, the animated image effect can then be clearly seen from various positions. The PV module that can display three images has a stabilized power output of 87 W. The remarkable features of this module such as its animated image display, semitransparency, and acceptable power loss give it great potential for use in building-integrated photovoltaics. This paper could help improve the aesthetic appearance of PV modules, which may increase users' or architects' willingness to install PV modules on buildings.

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Thin film removal mechanisms in ns-laser processing of photovoltaic materials

Cited by 134 publications

References 31 publications

Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio

Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio

Impacts of Ambient and Ablation Plasmas on Short- and Ultrashort-Pulse Laser Processing of Surfaces

Design and Production of Animated Image Photovoltaic Modules

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