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eta-cell with two-photon excitation

A second approach to the eta-cell concept uses PbS quantum dots as absorber and explores possibilities to use a two-step excitation process. In principle a two-step excitation cell can give efficiencies above 60%.

A second approach to the eta-cell concept uses PbS quantum dots as absorber and explores possibilities to use a two-step excitation process. In principle a two-step excitation cell can give efficiencies above 60%.