Quadruple-junction thin-film silicon-based solar cells with high open-circuit voltage

Kim, Do Yun; Santbergen, Rudi; Tan, Hairen; Swaaij, R.A.C.M.M. van; Smets, Arno H. M.; Isabella, Olindo; Zeman, Miro

doi:10.1063/1.4892890

Cited by 46 publications

(9 citation statements)

References 21 publications

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“…A fundamental question addressed here is whether it is feasible to couple energy into a diffusion eigensolution, which has a greater energy density than that of the usual non-optimized energy density W d , as shown in figure 1(a). In case of light, an enhanced energy density inside the scattering medium is important for applications such in white LEDs [15][16][17][18], solar cells [19][20][21], random lasers [22][23][24], and biomedical optics [25].…”

Section: Introductionmentioning

confidence: 99%

Coupling of energy into the fundamental diffusion mode of a complex nanophotonic medium

et al. 2016

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We demonstrate experimentally that optical wavefront shaping increases light coupling into the fundamental diffusion mode of a scattering medium. The total energy density inside a scattering medium of zinc oxide nanoparticles was probed by exciting fluorescent spheres that were randomly positioned in the medium and collecting the fluorescent power. We optimized the incident wavefront to obtain a bright focus at the back surface of the sample and found that the concomitant fluorescent power is enhanced compared to a non-optimized incident wavefront. The observed enhancement increases with sample thickness. Based on diffusion theory, we derive a model wherein the distribution of the energy density of wavefront-shaped light is dominated by the fundamental diffusion mode. Our model agrees remarkably well with our experiments, notably since the model has no freely adjustable parameters. e1 ex

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Section: Introductionmentioning

confidence: 99%

Coupling of energy into the fundamental diffusion mode of a complex nanophotonic medium

et al. 2016

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“…The same principle may also be applied to engineer the bandgap of hydrogenated amorphous silicon oxide and hydrogenated amorphous silicon carbide alloys which have the potential to achieve higher V oc than a-Si:H in solar cells. [34][35][36][37] FIG. 5.…”

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confidence: 97%

High pressure processing of hydrogenated amorphous silicon solar cells: Relation between nanostructure and high open-circuit voltage

Fischer

Hui‐min

Melskens

et al. 2015

Applied Physics Letters

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This study gives a guideline on developing high bandgap, high quality hydrogenated amorphous silicon (a-Si:H) through a carefully engineered nanostructure. Single-junction a-Si:H solar cells with open-circuit voltages (Voc) above 950 mV and conversion efficiencies above 9% are realized by processing the absorber layers at high pressures of 7–10 mbar. The high Voc is a result of an increased bandgap, which is attributed to an increase in the average size of the open volume deficiencies in the absorber layer without a significant increase in the nanosized void density.

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“…Recently, Si et al have shown an initial efficiency of 11.8% using an amorphous silicon oxide (a-SiO x :H) top cell. 10) Under certain assumptions, thin film silicon four-junction devices using different silicon alloys can yield conversion efficiency of up to 19.8% as has recently been predicted. 11) The significant improvement we were able to obtain in the present work, we ascribe mainly to the following aspects: (1) improved optoelectronic properties of the ZnO:Al front electrode, 12) (2) the use of an efficient µc-SiO x :H based intermediate reflector, 13) (3) the use of an improved multilayer top cell p-layer, 14,15) and (4) the use of a textured antireflective foil.…”

Section: Introductionmentioning

confidence: 84%

Quadruple-junction solar cells and modules based on amorphous and microcrystalline silicon with high stable efficiencies

Kirner

Neubert

Schultz

et al. 2015

Jpn. J. Appl. Phys.

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Quadruple junction solar cells and modules are presented, which consist of hydrogenated amorphous (a-Si:H) and microcrystalline silicon (µc-Si:H) in the a-Si:H/a-Si:H/µc-Si:H/µc-Si:H configuration. The highest measured conversion efficiency of a mini-module with an aperture area of 61.44 cm 2 was 13.4% before and 12.0% after more than 1000 h of light soaking, respectively. In this paper, we discuss the advantages of the quadruple junction design over the common tandem design, which is ascribed mainly to the fact that the total absorber thickness can be increased while electronic properties and stability are maintained or even improved. The role of the µc-SiO x :H intermediate reflector is highlighted and an optimization of the doping concentration in this layer is presented. Furthermore, the advantage of the high maximum power voltage for the monolithic cell interconnection laser design of modules is shown.

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Quadruple-junction thin-film silicon-based solar cells with high open-circuit voltage

Cited by 46 publications

References 21 publications

Coupling of energy into the fundamental diffusion mode of a complex nanophotonic medium

Coupling of energy into the fundamental diffusion mode of a complex nanophotonic medium

High pressure processing of hydrogenated amorphous silicon solar cells: Relation between nanostructure and high open-circuit voltage

Quadruple-junction solar cells and modules based on amorphous and microcrystalline silicon with high stable efficiencies

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