Tuning optical/electrical properties of 2D/3D perovskite by the inclusion of aromatic cation
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Título
Tuning optical/electrical properties of 2D/3D perovskite by the inclusion of aromatic cationAutoría
Fecha de publicación
2018Editor
Royal Society of ChemistryISSN
1463-9076; 1463-9084Cita bibliográfica
RODRÍGUEZ-ROMERO, Jesús, et al. Tuning optical/electrical properties of 2D/3D perovskite by the inclusion of aromatic cation. Physical Chemistry Chemical Physics, 2018, vol. 20, no 48, p. 30189-30199.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://pubs.rsc.org/en/content/articlelanding/2018/cp/c8cp06418k#!divAbstractVersión
info:eu-repo/semantics/acceptedVersionResumen
The employment of bulky aliphatic cations in the manufacture of moisture-stable materials has triggered
the development and application of 2D/3D perovskites as sensitizers in moisture-stable solar cells.
Although ... [+]
The employment of bulky aliphatic cations in the manufacture of moisture-stable materials has triggered
the development and application of 2D/3D perovskites as sensitizers in moisture-stable solar cells.
Although it is true that the moisture stability increases, it is also true that the photovoltaic performance
of 2D/3D PVK materials is severely limited owing to quantum and dielectric confinement effects.
Accordingly, it is necessary the synthesis and deep optical characterization of materials with an adequate
management of dielectric contrast between the layers. Here, we demonstrate the successful tuning of
dielectric confinement by the inclusion of a conjugated molecule, as a bulky cation, in the fabrication of
the 2D/3D PVK material (C6H5NH3)2(CH3NH3)n1PbnI3n+1, where n = 3 or 5. The absence of excitonic
states related to n Z 1 at room temperature, as well as the very low concentration of excitons after 1 ps
of excitation of samples in which n Z 3, provide strong evidence of an excellent ability to dissociate
excitons into free charge carriers. As consequence films with low n, presenting higher stability than
standard 3D perovskites, improved significantly their performance, showing one of the highest short
circuit current density (Jsc E 13.8) obtained to date for perovskite materials within the 2D limit (n o 10). [-]
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Phys. Chem. Chem. Phys., 2018,20, 30189-30199Derechos de acceso
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