High‐efficiency microcrystalline silicon single‐junction solar cells

Hänni, Simon; Bugnon, G.; Parascandolo, Gaetano; Boccard, Mathieu; Escarré, Jordi; Despeisse, M.; Meillaud, Fanny; Ballif, Christophe

doi:10.1002/pip.2398

Cited by 96 publications

(86 citation statements)

References 39 publications

(45 reference statements)

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“…The optical losses are most sensitive to metal textures with dimensions ranging from 30 to 100 nm [33,35]. The optical losses can be reduced, but not prevented by inserting a dielectric layer with a low refractive index between the metal back reflector and the silicon solar cell [3,4,6,27,35]. In the current study, and in most studies in the literature, a sputtered metal oxide film, e.g., zinc oxide, is inserted between the metal back reflector and the silicon solar cell.…”

Section: Comparison Of Contact and Absorber Textured Solar Cellsmentioning

confidence: 99%

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Comparison of Light Trapping in Silicon Nanowire and Surface Textured Thin-Film Solar Cells

et al. 2017

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Abstract:The optics of axial silicon nanowire solar cells is investigated and compared to silicon thin-film solar cells with textured contact layers. The quantum efficiency and short circuit current density are calculated taking a device geometry into account, which can be fabricated by using standard semiconductor processing. The solar cells with textured absorber and textured contact layers provide a gain of short circuit current density of 4.4 mA/cm 2 and 6.1 mA/cm 2 compared to a solar cell on a flat substrate, respectively. The influence of the device dimensions on the quantum efficiency and short circuit current density will be discussed.

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Section: Comparison Of Contact and Absorber Textured Solar Cellsmentioning

confidence: 99%

“…Experimentally, high conversion efficiencies have been achieved by texturing the contact layers of silicon solar cells [2][3][4][5][6][7][8][9]. The nanotextured contact layers reduce reflection losses and enhance the scattering and diffraction of light within the solar cells.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Light Trapping in Silicon Nanowire and Surface Textured Thin-Film Solar Cells

et al. 2017

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“…IV curve of a micromorph cell with an efficiency of 11.75%, deposited using highly transparent ZnO electrodes. and the SiO-based IRL were made in an Octopus I cluster tool made by INDEOtec SA, whereas the µc-Si:H cell was made in a research-scale reactor developed in-house [27]. Figure 5 shows various spectra obtained when simulating this set of experimental data with the model presented in reference [7].…”

Section: Resultsmentioning

confidence: 99%

The role of front and back electrodes in parasitic absorption in thin-film solar cells

et al. 2014

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When it comes to parasitic absorption in thin-film silicon solar cells, most studies focus on one electrode only, most of the time the substrate (in n-i-p configuration) or superstrate (in p-i-n configuration). We investigate here simultaneously the influence of the absorption in both front and back electrodes on the current density of tandem micromorph solar cells in p-i-n configuration. We compare four possible combinations of front and back electrodes with two different doping levels, but identical sheet resistance and identical light-scattering properties. In the infrared part of the spectrum, parasitic absorption in the front or back electrode is shown to have a similar effect on the current generation in the cell, which is confirmed by modeling. By combining highly transparent front and back ZnO electrodes and high-quality silicon layers, a micromorph device with a stabilized efficiency of 11.75% is obtained.

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“…We investigate processes which target high material growth rates to reduce the fabrication costs per unit and to increase the throughput of the deposition system. Studies on how to reach world record solar cell efficiencies were given by Hänni et al [6] for μc-Si:H single junction solar cells and by Kim et al [7] and Guha et al [8] for multijunction solar cells. Further details about the recent developments in the field of thin-film solar cells from research a e-mail: ma.meier@fz-juelich.de scale to industrial scale can be found in a comprehensive overview published by Shah et al [9].…”

Section: Introductionmentioning

confidence: 99%

Microcrystalline silicon absorber layers prepared at high deposition rates for thin-film tandem solar cells

et al. 2013

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We have investigated high deposition rate processes for the fabrication of thin-film silicon tandem solar cells. Microcrystalline silicon absorber layers were prepared under high pressure depletion conditions at an excitation frequency of 81.36 MHz. The deposition rate was varied in the range of 0.2 nm/s to 3.2 nm/s by varying the deposition pressure and deposition power for given electrode spacings. The silane-to-hydrogen process gas mixture was adjusted in each case to prepare optimum phase mixture material. The performance of these tandem solar cells was investigated by external quantum efficiency and current-voltage measurements under AM1.5 illumination before and after 1000 h of light degradation. Up to deposition rates of 0.8 nm/s for the microcrystalline silicon absorber layer high quality tandem solar cells with an initial efficiency of 10.9% were obtained (9.9% stabilized efficiency after 1000 h of light degradation).

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High‐efficiency microcrystalline silicon single‐junction solar cells

Cited by 96 publications

References 39 publications

Comparison of Light Trapping in Silicon Nanowire and Surface Textured Thin-Film Solar Cells

Comparison of Light Trapping in Silicon Nanowire and Surface Textured Thin-Film Solar Cells

The role of front and back electrodes in parasitic absorption in thin-film solar cells

Microcrystalline silicon absorber layers prepared at high deposition rates for thin-film tandem solar cells

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