Publicación:
Optical characterization and bandgap engineering of flat and wrinkle-textured FA0.83 Cs0.17 Pb(I1 − xBrx)3 perovskite thin films
Optical characterization and bandgap engineering of flat and wrinkle-textured FA0.83 Cs0.17 Pb(I1 − xBrx)3 perovskite thin films
dc.contributor.author | Tejada Esteves, Alvaro | es_PE |
dc.date.accessioned | 2024-05-30T23:13:38Z | |
dc.date.available | 2024-05-30T23:13:38Z | |
dc.date.issued | 2018 | |
dc.description.abstract | The complex refractive indices of formamidinium cesium lead mixed-halide (FA0.83Cs0.17Pb(I1 − xBrx)3) perovskite thin films of compositions ranging from x = 0 to 0.4, with both flat and wrinkle-textured surface topographies, are reported. Films are characterized using a combination of variable angle spectroscopic ellipsometry and spectral transmittance in the wavelength range of 190 nm to 850 nm. Optical constants, film thicknesses and roughness layers are obtained point-by-point by minimizing a global error function, without using optical dispersion models, and including topographical information supplied by a laser confocal microscope. To evaluate the bandgap engineering potential of the material, the optical bandgaps and Urbach energies are then accurately determined by applying a band fluctuations model for direct semiconductors, which considers both the Urbach tail and the fundamental band-to-band absorption region in a single equation. With this information, the composition yielding the optimum bandgap of 1.75 eV for a Si-perovskite tandem solar cell is determined. | |
dc.description.sponsorship | Fondo Nacional de Desarrollo Científico y Tecnológico - Fondecyt | |
dc.identifier.uri | https://hdl.handle.net/20.500.12390/1558 | |
dc.language.iso | eng | |
dc.publisher | Pontificia Universidad Católica del Perú | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.5/pe/ | |
dc.subject | Perovskita | |
dc.subject | Óptica | es_PE |
dc.subject | Películas delgadas | es_PE |
dc.subject.ocde | https://purl.org/pe-repo/ocde/ford#1.03.00 | |
dc.title | Optical characterization and bandgap engineering of flat and wrinkle-textured FA0.83 Cs0.17 Pb(I1 − xBrx)3 perovskite thin films | |
dc.type | info:eu-repo/semantics/masterThesis | |
dspace.entity.type | Publication | |
oairecerif.author.affiliation | #PLACEHOLDER_PARENT_METADATA_VALUE# |