Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space
[EN] Since the emergence of lead halide perovskites for photovoltaic research, there has been mounting effort in the search for alternative compounds with improved or complementary physical, chemical, or optoelectronic properties. Here, we report the discovery of Cu2AgBiI6: a stable, inorganic, lead...
| Autores: | , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/232901 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/232901 |
| Access Level: | acceso abierto |
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Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase SpaceSansom, Harry C.Wright, Adam D.Buizza, Leonardo R. V.Mahesh, SuhasWenger, BernardZanella, MarcoAbdi-Jalebi, MojtabaPitcher, Michael J.Dyer, Matthew S.Manning, Troy D.Friend, Richard H.Herz, Laura M.Snaith, Henry J.Claridge, John B.Rosseinsky, Matthew J.Longo, Giulia|||0000-0002-1163-1110[EN] Since the emergence of lead halide perovskites for photovoltaic research, there has been mounting effort in the search for alternative compounds with improved or complementary physical, chemical, or optoelectronic properties. Here, we report the discovery of Cu2AgBiI6: a stable, inorganic, lead-free wide-band-gap semiconductor, well suited for use in lead-free tandem photovoltaics. We measure a very high absorption coefficient of 1.0 x 10(5) cm(-1) near the absorption onset, several times that of CH3NH3PbI3. Solution-processed Cu2AgBiI6 thin films show a direct band gap of 2.06(1) eV, an exciton binding energy of 25 meV, a substantial charge-carrier mobility (1.7 cm(2) V--(1) s(-)(1)), a long photoluminescence lifetime (33 ns), and a relatively small Stokes shift between absorption and emission. Crucially, we solve the structure of the first quaternary compound in the phase space among CuI, AgI and BiI3. The structure includes both tetrahedral and octahedral species which are open to compositional tuning and chemical substitution to further enhance properties. Since the proposed double-perovskite Cs2AgBiI6 thin films have not been synthesized to date, Cu-2 AgBiI6 is a valuable example of a stable Ag+/Bi3+ octahedral motif in a close-packed iodide sublattice that is accessed via the enhanced chemical diversity of the quaternary phase space.H.C.S. is thankful to the EPSRC for support under EP/N004884/1 and for a Ph.D. studentship at the University of Liverpool, and the EPSRC Prosperity Partnership EP/S004947/1 for current funding at the University of Oxford. G.L. acknowledges the EPSRC EP/M015254/2. A.D. W. acknowledges support from the EPSRC EP/P033229/1. L.R.V.B. acknowledges funding from the Oxford-Radcliffe Scholarship and the EPSRC Centre for Doctoral Training in New and Sustainable Photovoltaics. S. M. acknowledges funding from the Rhodes Trust (India & Worcester 2016). M.A.-J. acknowledges the Royal Society (RGS\R1\211068), Cambridge Materials Limited, and Wolfson College, University of Cambridge for their funding and technical support. This work used the Cirrus UK National Tier-2 HPC Service at EPCC (http://www.cirrus.ac.uk) funded by the University of Edinburgh and EPSRC (EP/P020267/1).American Chemical SocietyDepartamento de Física AplicadaInstituto de Diseño para la Fabricación y Producción AutomatizadaRoyal Society, Reino UnidoEngineering and Physical Sciences Research Council, Reino UnidoRepositorio Institucional de la Universitat Politècnica de València Riunet20212021-03-17journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/232901reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengEngineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FP033229%2F1Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FN004884%2F1Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FS004947%2F1Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FM015254%2F2Royal Society, Reino Unido Royal Society, Reino Unido RGS\R1\211068open accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento (by)http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/2329012026-06-13T07:49:27Z |
| dc.title.none.fl_str_mv |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| title |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| spellingShingle |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space Sansom, Harry C. |
| title_short |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| title_full |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| title_fullStr |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| title_full_unstemmed |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| title_sort |
Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI-AgI-BiI3 Phase Space |
| dc.creator.none.fl_str_mv |
Sansom, Harry C. Wright, Adam D. Buizza, Leonardo R. V. Mahesh, Suhas Wenger, Bernard Zanella, Marco Abdi-Jalebi, Mojtaba Pitcher, Michael J. Dyer, Matthew S. Manning, Troy D. Friend, Richard H. Herz, Laura M. Snaith, Henry J. Claridge, John B. Rosseinsky, Matthew J. Longo, Giulia|||0000-0002-1163-1110 |
| author |
Sansom, Harry C. |
| author_facet |
Sansom, Harry C. Wright, Adam D. Buizza, Leonardo R. V. Mahesh, Suhas Wenger, Bernard Zanella, Marco Abdi-Jalebi, Mojtaba Pitcher, Michael J. Dyer, Matthew S. Manning, Troy D. Friend, Richard H. Herz, Laura M. Snaith, Henry J. Claridge, John B. Rosseinsky, Matthew J. Longo, Giulia|||0000-0002-1163-1110 |
| author_role |
author |
| author2 |
Wright, Adam D. Buizza, Leonardo R. V. Mahesh, Suhas Wenger, Bernard Zanella, Marco Abdi-Jalebi, Mojtaba Pitcher, Michael J. Dyer, Matthew S. Manning, Troy D. Friend, Richard H. Herz, Laura M. Snaith, Henry J. Claridge, John B. Rosseinsky, Matthew J. Longo, Giulia|||0000-0002-1163-1110 |
| author2_role |
author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Departamento de Física Aplicada Instituto de Diseño para la Fabricación y Producción Automatizada Royal Society, Reino Unido Engineering and Physical Sciences Research Council, Reino Unido Repositorio Institucional de la Universitat Politècnica de València Riunet |
| description |
[EN] Since the emergence of lead halide perovskites for photovoltaic research, there has been mounting effort in the search for alternative compounds with improved or complementary physical, chemical, or optoelectronic properties. Here, we report the discovery of Cu2AgBiI6: a stable, inorganic, lead-free wide-band-gap semiconductor, well suited for use in lead-free tandem photovoltaics. We measure a very high absorption coefficient of 1.0 x 10(5) cm(-1) near the absorption onset, several times that of CH3NH3PbI3. Solution-processed Cu2AgBiI6 thin films show a direct band gap of 2.06(1) eV, an exciton binding energy of 25 meV, a substantial charge-carrier mobility (1.7 cm(2) V--(1) s(-)(1)), a long photoluminescence lifetime (33 ns), and a relatively small Stokes shift between absorption and emission. Crucially, we solve the structure of the first quaternary compound in the phase space among CuI, AgI and BiI3. The structure includes both tetrahedral and octahedral species which are open to compositional tuning and chemical substitution to further enhance properties. Since the proposed double-perovskite Cs2AgBiI6 thin films have not been synthesized to date, Cu-2 AgBiI6 is a valuable example of a stable Ag+/Bi3+ octahedral motif in a close-packed iodide sublattice that is accessed via the enhanced chemical diversity of the quaternary phase space. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 2021-03-17 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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info:eu-repo/semantics/article |
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article |
| dc.identifier.none.fl_str_mv |
https://riunet.upv.es/handle/10251/232901 |
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https://riunet.upv.es/handle/10251/232901 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FP033229%2F1 Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FN004884%2F1 Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FS004947%2F1 Engineering and Physical Sciences Research Council, Reino Unido https://doi.org/10.13039/501100000266 EP%2FM015254%2F2 Royal Society, Reino Unido Royal Society, Reino Unido RGS\R1\211068 |
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open access http://purl.org/coar/access_right/c_abf2 Reconocimiento (by) http://creativecommons.org/licenses/by/4.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Reconocimiento (by) http://creativecommons.org/licenses/by/4.0/ |
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openAccess |
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application/pdf |
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American Chemical Society |
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American Chemical Society |
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