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Comparative study of organic thin film tandem solar cells in alternative geometries
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10.1063/1.3050346
/content/aip/journal/jap/104/12/10.1063/1.3050346
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/12/10.1063/1.3050346
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

values of the materials used are displayed in the middle. To the left (APFO-3:PCBM) and to the right (APFO-Green5:PCBM). The modeled V-geometry is depicted at the upper middle. The layer sequence in the subcells is, from bottom to top, Al, active layer, and PEDOT:PSS (40 nm). The modeled stacked tandem cells are depicted at the bottom. To the left is the cell with a recombination layer depicted. Layers are, from bottom to top, Al, active layer 1, PEDOT:PSS (10 nm), active layer 2, and PEDOT:PSS (40 nm). To the right is a cell with a spacer layer, with layer sequence from bottom to top: Al, active layer 1, PEDOT:PSS (40 nm), PDMS (thick), PEDOT:PSS (40 nm), active layer 2, and PEDOT:PSS (40 nm). Note that material ordering is of importance in the stacked cells but not in the symmetric V-cell.

Image of FIG. 2.
FIG. 2.

Energy dissipation of -polarized light in active layer in a V-cell with folding angle for three active layer thicknesses (shown in legend, in nanometers). Solid lines show calculated energy dissipation without assumption of anisotropic layers. Dashed lines show the same information obtained with the anisotropy assumption.

Image of FIG. 3.
FIG. 3.

(a) Energy dissipation in a folded tandem cell. Active layers are APFO-3:PCBM (left leg) and APFO-Green5:PCBM (right leg). Folding angle is and active layer thickness is 100 nm on both sides. PEDOT:PSS layer is 40 nm thick. Larger energy dissipation in the low bandgap subcell is seen. (b) Reflectance of folded tandem cells with active layer thickness (both sides) of 60 nm and PEDOT:PSS thickness of 40 nm.

Image of FIG. 4.
FIG. 4.

Energy redistribution maps for tandem cells with the same active layer thicknesses (60 nm) on both sides. Folding angles are (a) (planar cell) and (b) . PEDOT:PSS thickness is 40 nm.

Image of FIG. 5.
FIG. 5.

Predicted maximum photocurrent limit as function of active layer thicknesses. Folding angle is and PEDOT:PSS thickness is 40 nm.

Image of FIG. 6.
FIG. 6.

Active layer thicknesses giving equal current densities (i.e., corresponds to intersection line in Fig. 5). Rec, GR is a cell with the APFO-Green5:PCBM layer placed above an APFO-3:PCBM layer with a recombination layer in between; Rec, RG is a cell with the APFO-3:PCBM layer placed above an APFO-Green5:PCBM layer with a recombination layer; Spac, GR a cell with the APFO-Green5:PCBM layer placed above an APFO-3:PCBM layer with a spacer layer in between; Spac, RG a cell with the APFO-3:PCBM layer placed above an APFO-Green5:PCBM layer with a spacer layer; V, 20 deg is a V tandem cell with folding angle.

Image of FIG. 7.
FIG. 7.

Predicted maximum balanced current density. Rec stands for a stacked cell with recombination layer. Rec, GR is a cell with the APFO-Green5:PCBM layer placed above an APFO-3:PCBM layer with a recombination layer in between; Rec, RG is a cell with the APFO-3:PCBM layer placed above an APFO-Green5:PCBM layer with a recombination layer; Spac, GR a cell with the APFO-Green5:PCBM layer placed above an APFO-3:PCBM layer with a spacer layer in between; Spac, RG a cell with the APFO-3:PCBM layer placed above an APFO-Green5:PCBM layer with a spacer layer; V, 20 deg is a V tandem cell with folding angle.

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/content/aip/journal/jap/104/12/10.1063/1.3050346
2008-12-22
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Comparative study of organic thin film tandem solar cells in alternative geometries
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/12/10.1063/1.3050346
10.1063/1.3050346
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