0000000000444946

AUTHOR

Annemarie Pucci

showing 2 related works from this author

Quantifying the Composition of Methylammonium Lead Iodide Perovskite Thin Films with Infrared Spectroscopy

2019

Lead halide perovskites (ABX3) are generally formed from a reaction of the lead halide salt (BX2) with the halide salt of the A cation (AX). The effects of varying film compositions as result of non-stoichiometric precursor ratios on electronic properties of halide perovskites are currently under debate. It is imperative, but experimentally challenging, to determine the chemical composition of thin films as a function of precursor ratio for a full understanding of the effect. Herein we report a precise quantification of the methylammonium (MA) content in differently fabricated films of MAPbI3 via infrared (IR) spectroscopy. We compare the thin film data to the first high quality dielectric …

Materials scienceInfraredAnalytical chemistryInfrared spectroscopyHalideSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsGeneral EnergyEllipsometryPhysical and Theoretical ChemistryThin filmSpectroscopyChemical compositionPerovskite (structure)The Journal of Physical Chemistry C
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Infrared study of the MoO3 doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP)

2013

AbstractElectrochemical doping produces clear changes in the vibrational spectra of organic semiconductors as we show here for the system molybdenum oxide (MoO3) doped into the charge transport material 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP). Based on density-functional theory (DFT) calculations of vibrational spectra, the new spectral features can be attributed to the CBP cation that forms as a result of electron transfer from CBP to MoO3. The intensity of the new vibrational lines is a direct measure for the probability of charge transfer. MoO3 agglomerating within the CBP matrix limits the active interface area between the two species. The appearance of a broad electronic transition …

Charge dissociationChemistry(all)Electrochemical dopingInfraredChemistryAgglomerationDopingAnalytical chemistryInfrared spectroscopyDoping efficiencyGeneral ChemistryElectronic structureCondensed Matter PhysicsMolecular electronic transitionElectronic Optical and Magnetic MaterialsBiomaterialsOrganic semiconductorElectron transferCharge transferMaterials ChemistryElectrical and Electronic EngineeringInfrared spectroscopyExcitationOrganic Electronics
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