Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions

A key aspect in the optimization of perovskite (PVK) solar cells is the mitigation of interface losses, which are determined by energy band offsets and recombination. Counterintuitively, recent experimental evidence on inorganic PVK solar cells shows that increasing band offsets may improve open-cir...

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Autores principales: Córdoba, Matías, Taretto, Kurt
Formato: Articulo article acceptedVersion
Lenguaje:Inglés
Publicado: Wiley 2023
Materias:
Células solares
Solar cells
PVK
Bandas de energía
Energy band
Interfaz
Interface
Ciencias Aplicadas
Acceso en línea:http://rdi.uncoma.edu.ar/handle/uncomaid/18115
Aporte de:
Repositorio Institucional UNCo de Universidad Nacional del Comahue
id I22-R178-uncomaid-18115
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spelling I22-R178-uncomaid-181152024-09-05T11:58:19Z Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions Córdoba, Matías Taretto, Kurt Células solares Solar cells PVK Bandas de energía Energy band Interfaz Interface Ciencias Aplicadas A key aspect in the optimization of perovskite (PVK) solar cells is the mitigation of interface losses, which are determined by energy band offsets and recombination. Counterintuitively, recent experimental evidence on inorganic PVK solar cells shows that increasing band offsets may improve open-circuit voltage at efficiency levels over 20%. In order to improve the knowledge of the impact of interfaces, the authors model solar cells consisting of an intrinsic absorber material containing mobile ions, sandwiched between two wide-gap charge transport layers. The results show that minimizing band offsets decreases interface losses in various scenarios, but cannot be adopted as a universal optimization rule. For instance, even in the absence of interface recombination, unequal majority carrier band offsets avoid high injection conditions. Moreover, assuming a fixed band offset at one interface, the band offset at the opposite interface should be reduced if it shows the highest interface recombination, or increased if it shows the lowest recombination. Remarkably, it is found that solar cells with mobile ions hold the potential to outperform of ion-free counterparts, depending on the extent to which the interplay between band offsets and Debye layers result in the establishment of a majority carrier concentration in the intrinsic absorber. Fil: Córdoba, Matías. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Electrotecnia; Argentina. Fil: Taretto, Kurt. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Electrotecnia; Argentina. Fil: Taretto, Kurt. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto PROBIEN; Argentina. 2023 2024-09-02T18:43:43Z 2024-09-02T18:43:43Z Articulo article acceptedVersion 2367-198X 2367-198X http://rdi.uncoma.edu.ar/handle/uncomaid/18115 eng https://doi.org/10.1002/solr.202300742 Atribución-NoComercial-CompartirIgual 2.5 Argentina https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ application/pdf application/pdf Wiley Solar RRL. Volume 8, Issue 2 Jan 2024
institution Universidad Nacional del Comahue
institution_str I-22
repository_str R-178
collection Repositorio Institucional UNCo
language Inglés
topic Células solares
Solar cells
PVK
Bandas de energía
Energy band
Interfaz
Interface
Ciencias Aplicadas
spellingShingle Células solares
Solar cells
PVK
Bandas de energía
Energy band
Interfaz
Interface
Ciencias Aplicadas
Córdoba, Matías
Taretto, Kurt
Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
topic_facet Células solares
Solar cells
PVK
Bandas de energía
Energy band
Interfaz
Interface
Ciencias Aplicadas
description A key aspect in the optimization of perovskite (PVK) solar cells is the mitigation of interface losses, which are determined by energy band offsets and recombination. Counterintuitively, recent experimental evidence on inorganic PVK solar cells shows that increasing band offsets may improve open-circuit voltage at efficiency levels over 20%. In order to improve the knowledge of the impact of interfaces, the authors model solar cells consisting of an intrinsic absorber material containing mobile ions, sandwiched between two wide-gap charge transport layers. The results show that minimizing band offsets decreases interface losses in various scenarios, but cannot be adopted as a universal optimization rule. For instance, even in the absence of interface recombination, unequal majority carrier band offsets avoid high injection conditions. Moreover, assuming a fixed band offset at one interface, the band offset at the opposite interface should be reduced if it shows the highest interface recombination, or increased if it shows the lowest recombination. Remarkably, it is found that solar cells with mobile ions hold the potential to outperform of ion-free counterparts, depending on the extent to which the interplay between band offsets and Debye layers result in the establishment of a majority carrier concentration in the intrinsic absorber.
format Articulo
article
acceptedVersion
author Córdoba, Matías
Taretto, Kurt
author_facet Córdoba, Matías
Taretto, Kurt
author_sort Córdoba, Matías
title Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
title_short Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
title_full Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
title_fullStr Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
title_full_unstemmed Insight into the Dependence of Photovoltaic Performance on Interfacial Energy Alignment in Solar Cells with Mobile Ions
title_sort insight into the dependence of photovoltaic performance on interfacial energy alignment in solar cells with mobile ions
publisher Wiley
publishDate 2023
url http://rdi.uncoma.edu.ar/handle/uncomaid/18115
work_keys_str_mv AT cordobamatias insightintothedependenceofphotovoltaicperformanceoninterfacialenergyalignmentinsolarcellswithmobileions
AT tarettokurt insightintothedependenceofphotovoltaicperformanceoninterfacialenergyalignmentinsolarcellswithmobileions
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