Toward Mass Production of Transition Metal Dichalcogenide Solar Cells: Scalable Growth of Photovoltaic-Grade Multilayer WSe 2 by Tungsten Selenization.

Autor:	Neilson KM; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States., Hamtaei S; Hasselt University, Imo-imomec, Hasselt 3500, Belgium.; Imec, Imo-imomec, Genk 3600, Belgium.; EnergyVille, Imo-imomec, Genk 3600, Belgium., Nassiri Nazif K; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States., Carr JM; University of Colorado Boulder, Materials Science & Engineering Program, Boulder, Colorado 80303, United States., Rahimisheikh S; University of Antwerp, Electron Microscopy for Materials Science (EMAT), Antwerpen 2020, Belgium., Nitta FU; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States.; Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States., Brammertz G; Hasselt University, Imo-imomec, Hasselt 3500, Belgium.; Imec, Imo-imomec, Genk 3600, Belgium.; EnergyVille, Imo-imomec, Genk 3600, Belgium., Blackburn JL; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Hadermann J; University of Antwerp, Electron Microscopy for Materials Science (EMAT), Antwerpen 2020, Belgium., Saraswat KC; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States.; Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States., Reid OG; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States.; Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States., Vermang B; Hasselt University, Imo-imomec, Hasselt 3500, Belgium.; Imec, Imo-imomec, Genk 3600, Belgium.; EnergyVille, Imo-imomec, Genk 3600, Belgium., Daus A; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States.; Sensors Laboratory, Department Microsystems Engineering (IMTEK), University Freiburg, Freiburg 79110, Germany., Pop E; Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States.; Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States.; Precourt Institute for Energy, Stanford University, Stanford, California 94305, United States.
Jazyk:	angličtina
Zdroj:	ACS nano [ACS Nano] 2024 Sep 10; Vol. 18 (36), pp. 24819-24828. Date of Electronic Publication: 2024 Aug 23.
DOI:	10.1021/acsnano.4c03590
Abstrakt:	Semiconducting transition metal dichalcogenides (TMDs) are promising for high-specific-power photovoltaics due to their desirable band gaps, high absorption coefficients, and ideally dangling-bond-free surfaces. Despite their potential, the majority of TMD solar cells to date are fabricated in a nonscalable fashion, with exfoliated materials, due to the lack of high-quality, large-area, multilayer TMDs. Here, we present the scalable, thickness-tunable synthesis of multilayer WSe 2 films by selenizing prepatterned tungsten with either solid-source selenium at 900 °C or H 2 Se precursors at 650 °C. Both methods yield photovoltaic-grade, wafer-scale WSe 2 films with a layered van der Waals structure and superior characteristics, including charge carrier lifetimes up to 144 ns, over 14× higher than those of any other large-area TMD films previously demonstrated. Simulations show that such carrier lifetimes correspond to ∼22% power conversion efficiency and ∼64 W g -1 specific power in a packaged solar cell, or ∼3 W g -1 in a fully packaged solar module. The results of this study could facilitate the mass production of high-efficiency multilayer WSe 2 solar cells at low cost.
Databáze:	MEDLINE
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