Long-term field screening by mobile ions in thick metal halide perovskites: understanding saturation currents
![Thumbnail](/xmlui/bitstream/handle/10234/202134/84728_AlmoraO_2022%20.pdf.jpg?sequence=5&isAllowed=y)
Ver/ Abrir
Impacto
![Google Scholar](/xmlui/themes/Mirage2/images/uji/logo_google.png)
![Microsoft Academico](/xmlui/themes/Mirage2/images/uji/logo_microsoft.png)
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
comunitat-uji-handle4:
INVESTIGACIONMetadatos
Título
Long-term field screening by mobile ions in thick metal halide perovskites: understanding saturation currentsFecha de publicación
2022-09-06Editor
WileyISSN
1862-6270Cita bibliográfica
Almora, O., Miravet, D., Gelmetti, I. and Garcia-Belmonte, G. (2022), Long-Term Field Screening by Mobile Ions in Thick Metal Halide Perovskites: Understanding Saturation Currents. Phys. Status Solidi RRL, 16: 2200336.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Metal halide perovskite-based semiconductor devices with micrometer-to-millimeter-thick perovskite layers show a current response upon polarization which evolves up to several hours, transiting several regimes. This ... [+]
Metal halide perovskite-based semiconductor devices with micrometer-to-millimeter-thick perovskite layers show a current response upon polarization which evolves up to several hours, transiting several regimes. This is the case of X-ray detectors where the use of absorber perovskites produces instabilities in the dark reverse saturation current hindering the signal processing. Even though these phenomena are often attributed to the electronic–ionic conductivity and the interface phenomena in these perovskites, a proper theoretical description is missing. Herein, the numerical simulation study reproduces the main experimental trends and explains the origin of some of the apparently-always-increasing current transients in thick perovskite samples. The mobile ion concentration and mobility are correlated with three main transport regimes and interpretation and parameterization are provided to the current saturation time in terms of the ionic screening of the electric field toward the interfaces. The final steady-state under reverse polarization is found as diffusion-limited electronic current, which results from abrupt mobile ion depletion proportional to the Debye length in the vicinity of a contact. The conclusions suggest the material optimization of the contact interfaces as a pathway to reduce the long current saturation times in these devices. [-]
Publicado en
Physica Status Solidi (RRL) Rapid Research Letters, 16 (2022)Entidad financiadora
Unió Europea | German Research Foundation (DFG) | Universidad Pablo de Olavide/CBUA
Código del proyecto o subvención
PEROXIS No. 871336
Título del proyecto o subvención
Horizon 2020 research and innovation program
Derechos de acceso
info:eu-repo/semantics/openAccess
Aparece en las colecciones
- INAM_Articles [521]