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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.08534 |
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| _version_ | 1866915266037809152 |
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| author | Neilson, Kathryn M. Hamtaei, Sarallah Nazif, Koosha Nassiri Carr, Joshua M. Rahimisheikh, Sepideh Nitta, Frederick U. Brammertz, Guy Blackburn, Jeffrey L. Hadermann, Joke Saraswat, Krishna C. Reid, Obadiah G. Vermang, Bart Daus, Alwin Pop, Eric |
| author_facet | Neilson, Kathryn M. Hamtaei, Sarallah Nazif, Koosha Nassiri Carr, Joshua M. Rahimisheikh, Sepideh Nitta, Frederick U. Brammertz, Guy Blackburn, Jeffrey L. Hadermann, Joke Saraswat, Krishna C. Reid, Obadiah G. Vermang, Bart Daus, Alwin Pop, Eric |
| contents | Semiconducting transition metal dichalcogenides (TMDs) are promising for high-specific-power photovoltaics due to desirable band gaps, high absorption coefficients, and ideally dangling-bond-free surfaces. Despite their potential, the majority of TMD solar cells are fabricated in a non-scalable fashion using exfoliated materials due to the absence of high-quality, large-area, multilayer TMDs. Here, we present the scalable, thickness-tunable synthesis of multilayer tungsten diselenide (WSe$_{2}$) films by selenizing pre-patterned tungsten with either solid source selenium or H$_{2}$Se precursors, which leads to smooth, wafer-scale WSe$_{2}$ films with a layered van der Waals structure. The films have charge carrier lifetimes up to 144 ns, over 14x higher than large-area TMD films previously demonstrated. Such high carrier lifetimes correspond to power conversion efficiency of ~22% and specific power of ~64 W g$^{-1}$ in a packaged solar cell, or ~3 W g$^{-1}$ in a fully-packaged solar module. This paves the way for the mass-production of high-efficiency multilayer WSe$_{2}$ solar cells at low cost. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_08534 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Toward Mass-Production of Transition Metal Dichalcogenide Solar Cells: Scalable Growth of Photovoltaic-Grade Multilayer WSe2 by Tungsten Selenization Neilson, Kathryn M. Hamtaei, Sarallah Nazif, Koosha Nassiri Carr, Joshua M. Rahimisheikh, Sepideh Nitta, Frederick U. Brammertz, Guy Blackburn, Jeffrey L. Hadermann, Joke Saraswat, Krishna C. Reid, Obadiah G. Vermang, Bart Daus, Alwin Pop, Eric Materials Science Semiconducting transition metal dichalcogenides (TMDs) are promising for high-specific-power photovoltaics due to desirable band gaps, high absorption coefficients, and ideally dangling-bond-free surfaces. Despite their potential, the majority of TMD solar cells are fabricated in a non-scalable fashion using exfoliated materials due to the absence of high-quality, large-area, multilayer TMDs. Here, we present the scalable, thickness-tunable synthesis of multilayer tungsten diselenide (WSe$_{2}$) films by selenizing pre-patterned tungsten with either solid source selenium or H$_{2}$Se precursors, which leads to smooth, wafer-scale WSe$_{2}$ films with a layered van der Waals structure. The films have charge carrier lifetimes up to 144 ns, over 14x higher than large-area TMD films previously demonstrated. Such high carrier lifetimes correspond to power conversion efficiency of ~22% and specific power of ~64 W g$^{-1}$ in a packaged solar cell, or ~3 W g$^{-1}$ in a fully-packaged solar module. This paves the way for the mass-production of high-efficiency multilayer WSe$_{2}$ solar cells at low cost. |
| title | Toward Mass-Production of Transition Metal Dichalcogenide Solar Cells: Scalable Growth of Photovoltaic-Grade Multilayer WSe2 by Tungsten Selenization |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.08534 |