Intermediate-phase engineering via dimethylammonium cation additive for stable perovskite solar cells.

Autor: McMeekin DP; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK. David.McMeekin@physics.ox.ac.uk.; Department of Chemical Engineering, Monash University, Clayton, Victoria, Australia. David.McMeekin@physics.ox.ac.uk.; ARC Centre of Excellence for Exciton Science, Monash University, Clayton, Victoria, Australia. David.McMeekin@physics.ox.ac.uk., Holzhey P; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK., Fürer SO; Department of Chemical Engineering, Monash University, Clayton, Victoria, Australia.; ARC Centre of Excellence for Exciton Science, Monash University, Clayton, Victoria, Australia., Harvey SP; Material Science Center, National Renewable Energy Laboratory, Golden, CO, USA., Schelhas LT; Applied Energy Programs, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Ball JM; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK., Mahesh S; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK., Seo S; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK., Hawkins N; Department of Zoology, University of Oxford, Oxford, UK., Lu J; Department of Chemical Engineering, Monash University, Clayton, Victoria, Australia.; ARC Centre of Excellence for Exciton Science, Monash University, Clayton, Victoria, Australia., Johnston MB; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK., Berry JJ; Material Science Center, National Renewable Energy Laboratory, Golden, CO, USA., Bach U; Department of Chemical Engineering, Monash University, Clayton, Victoria, Australia. Udo.Bach@monash.edu.; ARC Centre of Excellence for Exciton Science, Monash University, Clayton, Victoria, Australia. Udo.Bach@monash.edu., Snaith HJ; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK. Henry.Snaith@physics.ox.ac.uk.
Jazyk: angličtina
Zdroj: Nature materials [Nat Mater] 2023 Jan; Vol. 22 (1), pp. 73-83. Date of Electronic Publication: 2022 Dec 01.
DOI: 10.1038/s41563-022-01399-8
Abstrakt: Achieving the long-term stability of perovskite solar cells is arguably the most important challenge required to enable widespread commercialization. Understanding the perovskite crystallization process and its direct impact on device stability is critical to achieving this goal. The commonly employed dimethyl-formamide/dimethyl-sulfoxide solvent preparation method results in a poor crystal quality and microstructure of the polycrystalline perovskite films. In this work, we introduce a high-temperature dimethyl-sulfoxide-free processing method that utilizes dimethylammonium chloride as an additive to control the perovskite intermediate precursor phases. By controlling the crystallization sequence, we tune the grain size, texturing, orientation (corner-up versus face-up) and crystallinity of the formamidinium (FA)/caesium (FA) y Cs 1-y Pb(I x Br 1-x ) 3 perovskite system. A population of encapsulated devices showed improved operational stability, with a median T80 lifetime (the time over which the device power conversion efficiency decreases to 80% of its initial value) for the steady-state power conversion efficiency of 1,190 hours, and a champion device showed a T80 of 1,410 hours, under simulated sunlight at 65 °C in air, under open-circuit conditions. This work highlights the importance of material quality in achieving the long-term operational stability of perovskite optoelectronic devices.
(© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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