Microanalysis of laser micro-welded interconnections in CIGS PV modules

Westin, Per-Oskar; Wätjen, Jörn Timo; Zimmermann, Uwe; Edoff, Marika

doi:10.1016/j.solmat.2011.07.032

Cited by 16 publications

(19 citation statements)

References 5 publications

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“…In combination with a change in composition of the CIGS due to the laser treatment, this might serve as electrical contact between front and back contact (P2 line). The authors found the according laser parameters to be around 0.8 W at a repetition rate of 80 kHz [21], which leads to larger energy deposition in CIGS compared with our study (our laser parameters were 0.2 W at a repetition rate of 500 kHz). Accordingly, our results show just some "tiny" TCO lift off.…”

Section: Inducing Weak Diodes By Femtosecond Lasercontrasting

confidence: 45%

“…The concept of thin-film solar cells based on copper indium gallium selenide (CIGS) is one promising approach for a further decrease of the price of PV modules. Indeed, significant progress has been achieved in increasing the efficiency up to 21.7% for single cells [1]. The power conversion efficiencies of CIGS modules have reached 18.7% for mini-modules and surpassed 15% for conventional modules easily [2].…”

Section: Introductionmentioning

confidence: 99%

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Visualizing the performance loss of solar cells by IR thermography — an evaluation study on CIGS with artificially induced defects

Vetter

Babbe

Hofbeck

et al. 2016

Progress in Photovoltaics

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Local electric defects may result in considerable performance losses in solar cells. Infrared (IR) thermography is one important tool to detect these defects on photovoltaic modules. Qualitative interpretation of IR images has been carried out successfully, but quantitative interpretation has been hampered by the lack of “calibration” defects. The aims of this study are to (i) establish methods to induce well‐defined electric defects in thin‐film solar cells serving as “calibration” defects and to (ii) assess the accuracy of IR imaging methods by using these artificially induced defects. This approach paves the way for improving quality control methods based on imaging in photovoltaic. We created ohmic defects (“shunts”) by using a focused ion beam and weak diodes (“interface shunts”) by applying a femto‐second laser at rather low power on copper indium gallium selenide cells. The defects can be induced precisely and reproducibly, and the severity of the defects on the electrical performance can be well adjusted by focused ion beam/laser parameters. The successive assessment of the IR measurement (ILIT‐Voc) revealed that this method can predict the losses in Pmpp (maximal power extractable) with a mean error of below 10%. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Inducing Weak Diodes By Femtosecond Lasercontrasting

confidence: 45%

Section: Introductionmentioning

confidence: 99%

Visualizing the performance loss of solar cells by IR thermography — an evaluation study on CIGS with artificially induced defects

Vetter

Babbe

Hofbeck

et al. 2016

Progress in Photovoltaics

View full text Add to dashboard Cite

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“…The fractured molybdenum substrate (eroded) yields a poor electrical connection to the back contact of the solar cell [27,28]. Such damage suggests limiting particle velocities to below 200 m/s using a gas velocity of 270 m/s at an operating stagnation pressure of P 0 = 1.5 bar.…”

Section: Single Cigs Particlesmentioning

confidence: 99%

Thin-film metallization of CuInGaSe2 nanoparticles by supersonic kinetic spraying

Park

Lee

James

et al. 2015

Computational Materials Science

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“…The laser modification of photovoltaic cells is based on laser ablation of material, and it is associated with the absorption of electromagnetic radiation, which results in a significant heating of the structure, local melting, and evaporation of the substrate. The mentioned phenomena are described by Gecys, Westin, and Pawlak's groups [24][25][26][27]. During laser modification of photovoltaic cells, thermally induced structural local changes [28] or phase transitions to the metallic state [29] could be expected.…”

Section: Introductionmentioning

confidence: 98%

Efficiency of Laser-Shaped Photovoltaic Cells

et al. 2020

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The main aim of this paper is to analyze the influence of laser shaping of the photovoltaic cell based on its efficiency. The authors described both process of the monocrystalline photovoltaic cell manufacturing, its efficiency, and the possibilities of usage in architecture and the process of creating the photovoltaic cells of unconventional shapes by using laser technology. A method for cutting photovoltaic cells using a fiber laser was presented as well as the parameters of the laser cutting process. The described method allows cutting the massively produced silicon cells according to the predetermined trajectory. Using the proposed process parameters, satisfactory cutting edge quality, and negligible impact of the laser beam on changes in the structure of the photovoltaic cell active layers were achieved. In each cycle of structure cutting, only a small part of the material is removed (from 1 to 2 μm), and depending on the thickness, the process is repeated from 50 to 300 times. It has been shown that the efficiency of the modified cells depends on the ratio of their surface area to the laser cutting line.

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Microanalysis of laser micro-welded interconnections in CIGS PV modules

Cited by 16 publications

References 5 publications

Visualizing the performance loss of solar cells by IR thermography — an evaluation study on CIGS with artificially induced defects

Visualizing the performance loss of solar cells by IR thermography — an evaluation study on CIGS with artificially induced defects

Thin-film metallization of CuInGaSe2 nanoparticles by supersonic kinetic spraying

Efficiency of Laser-Shaped Photovoltaic Cells

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