Abstract
Electrochemically deposited Cu2O solar cells are receiving growing attention owing to a recent doubling in efficiency. This was enabled by the controlled chemical environment used in depositing doped ZnO layers by atomic layer deposition, which is not well suited to large-scale industrial production. While open air fabrication with atmospheric pressure spatial atomic layer deposition overcomes this limitation, we find that this approach is limited by an inability to remove the detrimental CuO layer that forms on the Cu2O surface. Herein, we propose strategies for achieving efficiencies in atmospherically processed cells that are equivalent to the high values achieved in vacuum processed cells.
Highlights
Deposited Cu2O solar cells are receiving growing attention owing to a recent doubling in efficiency
While open air fabrication with atmospheric pressure spatial atomic layer deposition overcomes this limitation, we find that this approach is limited by an inability to remove the detrimental CuO layer that forms on the Cu2O surface
atomic layer deposition (ALD) is a vacuum-based, batch-processed and slow technique, whereas atmospheric pressure spatial atomic layer deposition (AP-SALD) enables the metal oxide deposition to occur rapidly, in open air, at low temperature, and in a roll-to-roll compatible manner, while retaining the high quality of the metal oxides produced by conventional ALD.[3]
Summary
Deposited Cu2O solar cells are receiving growing attention owing to a recent doubling in efficiency.
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