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Elucidating Operating Modes of Bulk Heterojunction Solar Cells from Impedance Spectroscopy Analysis

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Academic year: 2020

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Figure

Figure 1. Mechanisms governing the Fermi level location within the effective  bandgap established between donor HOMO and acceptor LUMO levels
Figure 2. Capacitance-voltage extracted from impedance analysis for a variety  of different materials forming the blend of bulk-heterojunction solar cells
Figure 3. Recombination resistance versus voltage as derived from impedance  spectroscopy analysis
Table 1. Open-circuit voltage shift extracted from  j   curves (*) measured  V under 100 mW cm −2  simulated AM1.5 sunlight, in comparison from that  calculated from  R rec  versus voltage plot (Figure 3)
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