Outlook

Abstract

Further optimizations of P2 aggregate solar cells might be possible by

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Further optimizations of P2 aggregate solar cells might be possible by:

• using lower doped TiO₂ hole blocking layers (prepared, e.g., by SPD or spatial ALD in O₂ at atmospheric pressure)

• using higher amounts of the dye P2 (approx. up to 1 × 10⁻⁷ mol/cm²)

• using thinner coarse-porous TiO₂ layers (<1 μm)

• adjusting of the porosity, e.g., with TiO₂ particles between 37 and 100 nm in size

• infiltration of other HTMs into the coarse-porous TiO₂ (e.g. PEDOT:PSS).

Proposed further investigations:

• internal and external quantum efficiency measurements (IQE, EQE)

• efficiency measurements at different illumination intensities

• stability tests (accelerated aging under illumination at elevated temperatures)

• upscaling of the cells and combination to modules.