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The power conversion efficiency (η) of a dye solar cell (DSC) with a 13 μm thick TiO2 layer increases with solar AM1.5 light’s angle of incidence by 10% at 55° ± 5° and then decreases at higher angles due to Fresnel reflection at the front air/glass interface. For cells with thin TiO2 (3 μm), the enhancement in η is substantially larger (16%). We show, also through spectral quantum efficiency measurements, that the angular enhancement for thin cells is mainly due to optical path lengthening, quantifying the relevant parameters useful for photon management strategies and for understanding the productivity of DSC modules outdoors.
D’Ercole et al. (Mon,) studied this question.
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