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journal article·2024-09-10Open access

Toward Mass Production of Transition Metal Dichalcogenide Solar Cells: Scalable Growth of Photovoltaic-Grade Multilayer WSe2 by Tungsten Selenization

Kathryn M. Neilson, Sarallah Hamtaei, Koosha Nassiri Nazif, Joshua M. Carr, Sepideh Rahimisheikh, Frederick U. Nitta, Guy Brammertz, Jeffrey L. Blackburn, Joke Hadermann, Krishna C. Saraswat, Obadiah G. Reid, Bart Vermang, Alwin Daus, Eric Pop

ACS Nano· Volume 18· Issue 36
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Source abstract

Abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States

Hasselt University, Imo-imomec, Hasselt 3500, Belgium

Imec, Imo-imomec, Genk 3600, Belgium

EnergyVille, Imo-imomec, Genk 3600, Belgium

University of Colorado Boulder, Materials Science & Engineering Program, Boulder, Colorado 80303, United States

University of Antwerp, Electron Microscopy for Materials Science (EMAT), Antwerpen 2020, Belgium

Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States

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

Sensors Laboratory, Department Microsystems Engineering (IMTEK), University Freiburg, Freiburg 79110, Germany

Precourt Institute for Energy, Stanford University, Stanford, California 94305, United States

Funding

National Science Foundation Graduate Research Fellowship Program · Chemical Sciences, Geosciences, and Biosciences Division · Stanford University · Deutsche Forschungsgemeinschaft · Fonds Wetenschappelijk Onderzoek · Stanford Precourt Institute for Energy · Stanford SystemX Alliance

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