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Nanoparticulate Metal Oxide Top Electrode Interface Modification Improves the Thermal Stability of Inverted Perovskite Photovoltaics.

ABSTRACT: Solution processed ?-Fe2O3 nanoparticles via the solvothermal colloidal synthesis in conjunction with ligand-exchange method are used for interface modification of the top electrode in inverted perovskite solar cells. In comparison to more conventional top electrodes such as PC(70)BM/Al and PC(70)BM/AZO/Al, we show that incorporation of a ?-Fe2O3 provides an alternative solution processed top electrode (PC(70)BM/?-Fe2O3/Al) that not only results in comparable power conversion efficiencies but also improved thermal stability of inverted perovskite photovoltaics. The origin of improved stability of inverted perovskite solar cells incorporating PC(70)BM/ ?-Fe2O3/Al under accelerated heat lifetime conditions is attributed to the acidic surface nature of ?-Fe2O3 and reduced charge trapped density within PC(70)BM/ ?-Fe2O3/Al top electrode interfaces.

SUBMITTER: Papadas IT 

PROVIDER: S-EPMC6915520 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Nanoparticulate Metal Oxide Top Electrode Interface Modification Improves the Thermal Stability of Inverted Perovskite Photovoltaics.

Papadas Ioannis T IT   Galatopoulos Fedros F   Armatas Gerasimos S GS   Tessler Nir N   Choulis Stelios A SA  

Nanomaterials (Basel, Switzerland) 20191114 11

Solution processed γ-Fe<sub>2</sub>O<sub>3</sub> nanoparticles via the solvothermal colloidal synthesis in conjunction with ligand-exchange method are used for interface modification of the top electrode in inverted perovskite solar cells. In comparison to more conventional top electrodes such as PC(70)BM/Al and PC(70)BM/AZO/Al, we show that incorporation of a γ-Fe<sub>2</sub>O<sub>3</sub> provides an alternative solution processed top electrode (PC(70)BM/γ-Fe<sub>2</sub>O<sub>3</sub>/Al) that n  ...[more]

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