Enhanced recombination next to laser-patterned lines in CIGSe solar cells revealed by spectral and time-resolved photoluminescence

Schultz, Christof; Bartelt, Andreas; Junghans, Cornelia; Becker, Wolfgang; Schlatmann, Rutger; Stegemann, Bert

doi:10.1016/j.apsusc.2020.147721

Cited by 8 publications

(6 citation statements)

References 30 publications

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“…The sample preparation processes followed the procedure for perovskite and CIGSe baseline samples described in detail elsewhere [7,11,12]. The monolithic tandem device layer-stack is prepared in substrate configuration on a glass substrate.…”

Section: Sample Preparationmentioning

confidence: 99%

“…When selecting the most suitable laser pulse duration, the thermal sensitivity of the material under investigation must be considered [7]. For perovskite-CIGSe tandem solar cells, a ps laser is in principle well suited, as the CIGSe has a strong thermal sensitivity of [15].…”

Section: Setup Configuration and Scribe Line Essentialsmentioning

confidence: 99%

“…Thus, iso-cut patterning is the most crucial step. As discussed earlier, the CIGSe absorber layer is very sensitive to thermal influences [7,25]. Thus, in order to avoid unintended material alterations, the patterning should be carried out with carefully adjusted fluence and low pulse-to-pulse overlap.…”

Section: Iso-cut Patterningmentioning

confidence: 99%

“…It has been shown that for successful P3 patterning in terms of the resulting electrical functionality of the solar cell, the CIGSe absorber layer including the window layer stack does not necessarily have to be completely removed. A P3 patterning approach, which easily causes compositional changes in the scribe line vicinity [25] is assumed to lead to enhanced charge carrier trapping [7]. In contrast, due to the thermal sensitivity of the CIGSe, it is beneficial to selectively ablate only the window layer stack, thus avoiding laser-induced material alterations.…”

Section: P3 Patterningmentioning

confidence: 99%

“…Pulsed lasers are the tool of choice for all these patterning tasks, as they allow layer-selective material removal with a high reproducibility at the same time. The general principles of laser patterning of thin-films, especially the laser-material interaction processes with a focus on laser-induced material modifications, have been investigated and described in detail in previous work [6][7][8][9]. In general, the success of laser scribing is based on precisely controlled energy input and is mainly dependent on the thicknesses, absorption behavior, and detailed configuration of the layer stack to be patterned.…”

Section: Introductionmentioning

confidence: 99%

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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: Sample Preparationmentioning

confidence: 99%

Section: Setup Configuration and Scribe Line Essentialsmentioning

confidence: 99%

Section: Iso-cut Patterningmentioning

confidence: 99%

Section: P3 Patterningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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.

Self Cite

View full text Add to dashboard Cite

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Hyperspectral Photoluminescence Imaging for Spatially Resolved Determination of Electrical Parameters of Laser‐Patterned Perovskite Solar Cells

Schultz,

Fenske,

Dion-Bertrand

et al. 2023

Solar RRL

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Absolute calibrated hyperspectral photoluminescence (PL) imaging is utilized to access, in a simple and fast way, the spatial distribution of relevant solar cell parameters such as quasi‐Fermi level splitting (QFLS), optical diode factor (ODF), Urbach energies Eu and shunt resistances Rsh, without the need for electrical measurements. Since these metrics play a significant role in evaluating the process windows for electrical series interconnection by laser patterning, this approach is followed to systematically locate and quantify electrical losses that may occur as a result of the laser patterning process for monolithic series interconnection. It is shown that both ps and ns laser pulses can be used for successful series interconnection. In both cases, only minor lateral material alterations occur, localized in a few µm wide region adjacent to the edges of the scribe lines. Furthermore, the acquisition and analysis of these hyperspectral PL datasets provides insights in the material removal process, from which we conclude that the perovskite is rather resilient against the thermal impact of the laser.This article is protected by copyright. All rights reserved.

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Picosecond laser patterning for ultrathin spectrally selective solar mini-modules with transparent metal-oxide multilayer electrodes

Osterthun

Meddeb

Neugebohrn

et al. 2022

Applied Surface Science Advances

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Enhanced recombination next to laser-patterned lines in CIGSe solar cells revealed by spectral and time-resolved photoluminescence

Cited by 8 publications

References 30 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

Hyperspectral Photoluminescence Imaging for Spatially Resolved Determination of Electrical Parameters of Laser‐Patterned Perovskite Solar Cells

Picosecond laser patterning for ultrathin spectrally selective solar mini-modules with transparent metal-oxide multilayer electrodes

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