Moving Ions Vary Electronic Conductivity in Lead Bromide Perovskite Single Crystals through Dynamic Doping
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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INVESTIGACIONMetadatos
Título
Moving Ions Vary Electronic Conductivity in Lead Bromide Perovskite Single Crystals through Dynamic DopingAutoría
Fecha de publicación
2020-10Editor
WileyISSN
2199-160XCita bibliográfica
García‐Batlle, M., Baussens, O., Amari, S., Zaccaro, J., Gros‐Daillon, E., Verilhac, J.‐M., Guerrero, A., Garcia‐Belmonte*, G., Moving Ions Vary Electronic Conductivity in Lead Bromide Perovskite Single Crystals through Dynamic Doping. Adv. Electron. Mater. 2020, 6, 2000485. https://doi.org/10.1002/aelm.202000485Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://onlinelibrary.wiley.com/doi/10.1002/aelm.202000485Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Metal halide perovskite single crystals are being explored as functional materials for a variety of optoelectronic applications. Among others, solar cells, field‐effect transistors, and X‐ and γ‐ray detectors have ... [+]
Metal halide perovskite single crystals are being explored as functional materials for a variety of optoelectronic applications. Among others, solar cells, field‐effect transistors, and X‐ and γ‐ray detectors have shown improved performance and stability. However, a general uncertainty exists about the relevant mechanisms governing the electronic operation. This is caused by the presence of mobile ions and how these defect species alter the internal electrical field, interact with the contact materials, or modulate electronic properties. Here, a set of high‐quality thick methylammonium lead tribromide single crystals contacted with low‐reactivity chromium electrodes are analyzed by impedance spectroscopy. Through examination of the sample resistance evolution with bias and releasing time, it is revealed that an interplay exists between the perovskite electronic conductivity and the defect distribution within the crystal bulk. Ion diffusion after bias removing changes the local doping density then governing the electronic transport. These findings indicate that the coupling between ionic and electronic properties relies upon a dynamic doping effect caused by moving ions that act as mobile dopants. In addition to electronic features, the analysis extracts values for the ion diffusivity in the range of 10−8 cm2 s−1 in good agreement with other independent [-]
Publicado en
Advanced Electronic Materials, 2020, vol. 6, no 10Proyecto de investigación
Horizon 2020 project: 871336-PEROXIS; Generalitat Valenciana: GRISOLIAP/2018/073Derechos de acceso
info:eu-repo/semantics/openAccess
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