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Proceedings Paper

Investigating the effect of lamination on FAMACs: toward a new phase space of perovskite solar cell fabrication
Author(s): Amani H. Alfaifi; Sean P. Dunfield; Ariel E. Hasse; Bryon W. Larson; Matthew O. Reese; Joe Berry; Maikel van Hest; Najm Alhosiny; Davor Balzar; Sean E. Shaheen
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Paper 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°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.

Paper Details

Date Published: 10 October 2019
PDF: 7 pages
Proc. SPIE 11094, Organic, Hybrid, and Perovskite Photovoltaics XX, 1109420 (10 October 2019); doi: 10.1117/12.2529904
Show Author Affiliations
Amani H. Alfaifi, National Renewable Energy Lab. (United States)
Taif Univ. (Saudi Arabia)
Univ. of Denver (United States)
Sean P. Dunfield, National Renewable Energy Lab. (United States)
Univ. of Colorado Boulder (United States)
Ariel E. Hasse, National Renewable Energy Lab. (United States)
Bryon W. Larson, National Renewable Energy Lab. (United States)
Matthew O. Reese, National Renewable Energy Lab. (United States)
Joe Berry, National Renewable Energy Lab. (United States)
Maikel van Hest, National Renewable Energy Lab. (United States)
Najm Alhosiny, Taif Univ. (Saudi Arabia)
Davor Balzar, Univ. of Denver (United States)
Sean E. Shaheen, Univ. of Colorado, Boulder (United States)

Published in SPIE Proceedings Vol. 11094:
Organic, Hybrid, and Perovskite Photovoltaics XX
Zakya H. Kafafi; Paul A. Lane; Kwanghee Lee, Editor(s)

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