Investigating the Effect of Lamination on FAMACs: Toward a New Phase Space of Perovskite Solar Cell Fabrication: Paper No. 1109420

Sean Dunfield, Amani Alfaifi, Bryon Larson, Matthew Reese, Joseph Berry, Marinus Van Hest, Najm Alhosiny, Davor Balzar, Sean Shaheen, Ariel Hasse

Research output: Contribution to conferencePaper

1 Scopus Citations

Abstract

The rapid progress in the field of perovskite solar cells has led to efficiencies approaching that of crystalline silicon in single junction devices, and increasing emphasis is now being placed on scalable fabrication strategies that have the potential to truly impact the photovoltaics industry. The standard fabrication route of sequential, layer-bylayer depositions to form the device stack is limited by the small range of selective materials that can withstand successive solvent exposures and thermal annealings. In order to overcome this limitation, we have developed a method to fabricate the device stacks through mechanical lamination under moderate pressures and temperatures. The procedure involves fabricating two transparent conductive oxide/transport material/perovskite half stacks and laminating them together at the perovskite/perovskite interface. This procedure previously achieved 10% efficiency in initial attempts based on methyl ammonium lead iodide (MAPI) perovskite compositions. Herein, we reported the fabrication conditions to achieve a reproducible lamination with a complex, multi-cation perovskite, [Cs0.05(MA0.17F A0.83)0.95P b(I0.83Br0.17)3] (FAMACs), laminated at 18 degrees C and with a pressure of 350 psi for 30 minutes. The resulting material showed a sharpening of the optical absorption edge and a slight reduction in the band gap from 1.622 eV to 1.616 eV, indicative of improved ordering and reduced defects. Concurrently, time resolved photoluminescence measurements revealed an increased luminescence lifetime from 85 ns to 123 ns.
Original languageAmerican English
Number of pages7
DOIs
StatePublished - 2019
EventSPIE Organic Photonics + Electronics - San Diego, California
Duration: 23 Aug 201927 Aug 2019

Conference

ConferenceSPIE Organic Photonics + Electronics
CitySan Diego, California
Period23/08/1927/08/19

NREL Publication Number

  • NREL/CP-5K00-75820

Keywords

  • absorption
  • annealing
  • luminescence
  • perovskite
  • solar cells
  • transparent conductors

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