Characterization and simulation of a-Si:H/μc-Si:H tandem solar cells

Ding, Kaining; Kirchartz, Thomas; Pieters, Bart E.; Ulbrich, Carolin; Ermes, Alexander M.; Schicho, S.; Lambertz, Andreas; Carius, R.; Rau, Uwe

doi:10.1016/j.solmat.2011.07.023

Cited by 77 publications

(62 citation statements)

References 27 publications

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“…All three solar cell structures follow the same basic layer sequence with: a 500 nm thick sputtered aluminum doped zinc oxide (ZnO:Al) front contact, followed by a μc-Si:H p-i-n diode with a total thickness of 1000 nm, a back reflector consisting of 80 nm thick ZnO:Al, and a perfect electrical conductor (PEC, 100% reflection) terminating the stack. The layer sequence used for the simulations is consistent with The optical constants of the µc-Si:H material and the ZnO:Al film are adapted from the literature [4].…”

Section: Optics Of Microcrystalline Silicon Solar Cellsmentioning

confidence: 99%

“…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%

“…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%

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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: Optics Of Microcrystalline Silicon Solar Cellsmentioning

confidence: 99%

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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“…These films are necessary to provide an electron-hole pair separation mechanism in the absorber layer, but they are also a source of parasitic absorption [1,2]. However, these layers can provide greater control over optical reflection if properly designed.…”

Section: Introductionmentioning

confidence: 99%

Use of hexamethyldisiloxane for p-type microcrystalline silicon oxycarbide layers

et al. 2016

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The use of hexamethyldisiloxane (HMDSO) as an oxygen source for the growth of p-type siliconbased layers deposited by Plasma Enhanced Chemical Vapor Deposition is evaluated. The use of this source led to the incorporation of almost equivalent amounts of oxygen and carbon, resulting in microcrystalline silicon oxycarbide thin films. The layers were examined with characterisation techniques including Spectroscopic Ellipsometry, Dark Conductivity, Fourier Transform Infrared Spectroscopy, Secondary Ion Mass Spectrometry and Transmission Electron Microscopy to check material composition and structure. Materials studies show that the refractive indices of the layers can be tuned over the range from 2.5 to 3.85 (measured at 600 nm) and in-plane dark conductivities over the range from 10 −8 S/cm to 1 S/cm, suggesting that these doped layers are suitable for solar cell applications. The p-type layers were tested in single junction amorphous silicon p-i-n type solar cells.

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“…[ 26,27 ] Thus, in order to effectively tap this unused part of the spectrum, additional photovoltaic stacks of other inorganic materials such as microcrystalline silicon (mc-Si) are often placed in tandem. [28][29][30] As mc-Si has a band gap of 1.1 eV, it is able to absorb photons in the 1.1-1.75 eV energy range, thereby increasing the overall PCE of the cell. [28][29][30] However, the more expensive microcrystalline layers and additional conducting oxide layers required Adv.…”

mentioning

confidence: 99%

Tandem Solar Cells Made from Amorphous Silicon and Polymer Bulk Heterojunction Sub‐Cells

et al. 2014

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Characterization and simulation of a-Si:H/μc-Si:H tandem solar cells

Cited by 77 publications

References 27 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

Use of hexamethyldisiloxane for p-type microcrystalline silicon oxycarbide layers

Tandem Solar Cells Made from Amorphous Silicon and Polymer Bulk Heterojunction Sub‐Cells

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