Nanoscale Growth Initiation as a Pathway to Improve the Earth-Abundant Absorber Zinc Phosphide
(2022) In ACS Applied Energy Materials 5(5). p.5298-5306- Abstract
Growth approaches that limit the interface area between layers to nanoscale regions are emerging as a promising pathway to limit the interface defect formation due to mismatching lattice parameters or thermal expansion coefficient. Interfacial defect mitigation is of great interest in photovoltaics as it opens up more material combinations for use in devices. Herein, an overview of the vapor-liquid-solid and selective area epitaxy growth approaches applied to zinc phosphide (Zn3P2), an earth-abundant absorber material, is presented. First, we show how different morphologies, including nanowires, nanopyramids, and thin films, can be achieved by tuning the growth conditions and growth mechanisms. The growth conditions are also shown to... (More)
Growth approaches that limit the interface area between layers to nanoscale regions are emerging as a promising pathway to limit the interface defect formation due to mismatching lattice parameters or thermal expansion coefficient. Interfacial defect mitigation is of great interest in photovoltaics as it opens up more material combinations for use in devices. Herein, an overview of the vapor-liquid-solid and selective area epitaxy growth approaches applied to zinc phosphide (Zn3P2), an earth-abundant absorber material, is presented. First, we show how different morphologies, including nanowires, nanopyramids, and thin films, can be achieved by tuning the growth conditions and growth mechanisms. The growth conditions are also shown to greatly impact the defect structure and composition of the grown material, which can vary considerably from the ideal stoichiometry (Zn3P2). Finally, the functional properties are characterized. The direct band gap could accurately be determined at 1.50 ± 0.1 eV, and through complementary density functional theory calculations, we can identify a range of higher-order band gap transitions observed through valence electron energy loss spectroscopy and cathodoluminescence. Furthermore, we outline the formation of rotated domains inside of the material, which are a potential origin of defect transitions that have been long observed in zinc phosphide but not yet explained. The basic understanding provided reinvigorates the potential use of earth-abundant II-V semiconductors in photovoltaic technology. Moreover, the transferrable nanoscale growth approaches have the potential to be applied to other material systems, as they mitigate the constraints of substrate-material combinations causing interface defects.
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- author
- Escobar Steinvall, Simon LU ; Stutz, Elias Z. ; Paul, Rajrupa ; Zamani, Mahdi ; Leran, Jean Baptiste ; Dimitrievska, Mirjana and Fontcuberta I Morral, Anna
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- absorber, earth-abundant, nanoscale growth, selective area epitaxy, vapor-liquid-solid, zinc phosphide
- in
- ACS Applied Energy Materials
- volume
- 5
- issue
- 5
- pages
- 5298 - 5306
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:35647493
- scopus:85117279525
- ISSN
- 2574-0962
- DOI
- 10.1021/acsaem.1c02484
- language
- English
- LU publication?
- yes
- id
- 1f98af59-f27f-4f27-a183-d6d4429d63d7
- date added to LUP
- 2021-12-27 13:23:31
- date last changed
- 2024-06-01 22:37:49
@article{1f98af59-f27f-4f27-a183-d6d4429d63d7,
abstract = {{<p>Growth approaches that limit the interface area between layers to nanoscale regions are emerging as a promising pathway to limit the interface defect formation due to mismatching lattice parameters or thermal expansion coefficient. Interfacial defect mitigation is of great interest in photovoltaics as it opens up more material combinations for use in devices. Herein, an overview of the vapor-liquid-solid and selective area epitaxy growth approaches applied to zinc phosphide (Zn3P2), an earth-abundant absorber material, is presented. First, we show how different morphologies, including nanowires, nanopyramids, and thin films, can be achieved by tuning the growth conditions and growth mechanisms. The growth conditions are also shown to greatly impact the defect structure and composition of the grown material, which can vary considerably from the ideal stoichiometry (Zn3P2). Finally, the functional properties are characterized. The direct band gap could accurately be determined at 1.50 ± 0.1 eV, and through complementary density functional theory calculations, we can identify a range of higher-order band gap transitions observed through valence electron energy loss spectroscopy and cathodoluminescence. Furthermore, we outline the formation of rotated domains inside of the material, which are a potential origin of defect transitions that have been long observed in zinc phosphide but not yet explained. The basic understanding provided reinvigorates the potential use of earth-abundant II-V semiconductors in photovoltaic technology. Moreover, the transferrable nanoscale growth approaches have the potential to be applied to other material systems, as they mitigate the constraints of substrate-material combinations causing interface defects.</p>}},
author = {{Escobar Steinvall, Simon and Stutz, Elias Z. and Paul, Rajrupa and Zamani, Mahdi and Leran, Jean Baptiste and Dimitrievska, Mirjana and Fontcuberta I Morral, Anna}},
issn = {{2574-0962}},
keywords = {{absorber; earth-abundant; nanoscale growth; selective area epitaxy; vapor-liquid-solid; zinc phosphide}},
language = {{eng}},
number = {{5}},
pages = {{5298--5306}},
publisher = {{The American Chemical Society (ACS)}},
series = {{ACS Applied Energy Materials}},
title = {{Nanoscale Growth Initiation as a Pathway to Improve the Earth-Abundant Absorber Zinc Phosphide}},
url = {{http://dx.doi.org/10.1021/acsaem.1c02484}},
doi = {{10.1021/acsaem.1c02484}},
volume = {{5}},
year = {{2022}},
}