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Using impedance spectroscopy and computation, we show that incorporation of multi-walled carbon nanotubes (MWCNTs) in the bulk of the active layer of perovskite-based solar cells reduces charge recombination and increases the open circuit voltage. An ∼87% reduction in recombination was achieved when MWCNTs were introduced in the planar-heterostructure perovskite solar cell containing mixed counterions...
Herein we demonstrate that efficient perovskite solar cells can be fabricated by a desktop multi-channel inkjet printer. In this approach, different alkyl-ammonium counterions were loaded separately into the printer cartridges and deposited onto PbI2 coated substrates. Structural as well as electronic properties of perovskite solar cells can be tuned by varying the composition ratio of multiple cations...
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