Raman scattering quantitative assessment of the anion composition ratio in Zn(O,S) layers for Cd-free chalcogenide-based solar cells

Guc, Maxim; Neuschitzer, Markus; Hariskos, Dimitrios; Bauer, Andreas; Witte, Wolfram; Hempel, Wolfram; Calvo‐Barrio, L.; Pistor, Paul; Pérez-Rodrı́guez, A.; Izquierdo-Roca, Víctor

doi:10.1039/c5ra26261e

Cited by 14 publications

(12 citation statements)

References 27 publications

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“…That is, the behavior of the LVM is nearly unencumbered by modifications due to next‐nearest neighbor O atoms. However, with increasing O content the ZnS 1−x O x alloy system is predicted by the modified random element isodisplacement model to exhibit “two mode” behavior, in agreement with experiment . That is, the peak position of the LVM will shift to higher energies with increasing O content, similar to findings in other alloy systems .…”

Section: Composition Dependencesupporting

confidence: 81%

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x

Huso

Ritter

Bergman

et al. 2019

Physica Status Solidi (b)

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Substitution of O in the ZnS lattice is observed to result in a doublet consisting of two local vibrational modes (LVMs) and a second order harmonic of the LVMs. The first order doublet is attributed to vibrational modes of a defect with trigonal (C3v) symmetry. The results of temperature dependent resonant Raman scattering and anti‐Stokes scattering support this assignment. The substitution of O in the lattice also leads to the presence of LVM + nLO combination modes, which are interpreted in terms of the cascade model and resonance effects.

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Section: Composition Dependencesupporting

confidence: 81%

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x

Huso

Ritter

Bergman

et al. 2019

Physica Status Solidi (b)

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“…In thin film photovoltaics, a rigorous control of the optoelectronic properties of the growing layers is of major importance in terms for good reproducibility and homogeneity. We have shown in previous works that advanced Raman spectroscopy can assess relevant properties in photovoltaic materials such as film thickness24, crystal structure25, defect densities26, composition272829 and how it can be used as a versatile and fast tool for quality control and process monitoring24.…”

mentioning

confidence: 99%

Advanced Raman Spectroscopy of Methylammonium Lead Iodide: Development of a Non-destructive Characterisation Methodology

Pistor

Ruiz

Cabot

et al. 2016

Sci Rep

120

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In recent years, there has been an impressively fast technological progress in the development of highly efficient lead halide perovskite solar cells. However, the stability of perovskite films and respective solar cells is still an open point of concern and calls for advanced characterization methods. In this work, we identify appropriate measurement conditions for a meaningful analysis of spin-coated absorber-grade perovskite thin films based on methylammonium (MA) lead iodide (MAPbI3) by Raman spectroscopy. The material under investigation and its derivates is the most commonly used for high efficiency devices in the literatures and has yielded working solar cell devices with efficiencies around 10% in our laboratory. We report highly detailed Raman spectra obtained with excitation at 532 nm and 633 nm and their deconvolution taking advantage of the simultaneous fitting of spectra obtained with varying excitation wavelengths. Finally, we propose a fast and contactless methodology based on Raman to probe composition variations and/or degradation of these perovskite thin films and discuss the potential of the presented technique as quality control and degradation monitoring tool in other organic-inorganic perovskite materials and complete solar cell devices.

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“…For these applications, optical spectroscopy based on Raman scattering has already proved its versatility for controlling various important material parameters of the stacks used in thin film solar cells, including crystallinity 8 , absorber and buffer composition 9, 10 , buffer layer thickness 8 , presence of secondary interfacial phases 11, 12 and doping concentration 13 in separate layers, as well as complete devices 8 . This includes also the use of resonant Raman strategies for the high sensitivity assessment of nanometric layers and interfacial regions in the device structure.…”

Section: Introductionmentioning

confidence: 99%

Resonant Raman scattering based approaches for the quantitative assessment of nanometric ZnMgO layers in high efficiency chalcogenide solar cells

Guc

Hariskos

Calvo‐Barrio

et al. 2017

Sci Rep

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This work reports a detailed resonant Raman scattering analysis of ZnMgO solid solution nanometric layers that are being developed for high efficiency chalcogenide solar cells. This includes layers with thicknesses below 100 nm and compositions corresponding to Zn/(Zn + Mg) content rations in the range between 0% and 30%. The vibrational characterization of the layers grown with different compositions and thicknesses has allowed deepening in the knowledge of the sensitivity of the different Raman spectral features on the characteristics of the layers, corroborating the viability of resonant Raman scattering based techniques for their non-destructive quantitative assessment. This has included a deeper analysis of different experimental approaches for the quantitative assessment of the layer thickness, based on (a) the analysis of the intensity of the ZnMgO main Raman peak; (b) the evaluation of the changes of the intensity of the main Raman peak from the subjacent layer located below the ZnMgO one; and (c) the study of the changes in the relative intensity of the first to second/third order ZnMgO peaks. In all these cases, the implications related to the presence of quantum confinement effects in the nanocrystalline layers grown with different thicknesses have been discussed and evaluated.

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Raman scattering quantitative assessment of the anion composition ratio in Zn(O,S) layers for Cd-free chalcogenide-based solar cells

Cited by 14 publications

References 27 publications

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x

Advanced Raman Spectroscopy of Methylammonium Lead Iodide: Development of a Non-destructive Characterisation Methodology

Resonant Raman scattering based approaches for the quantitative assessment of nanometric ZnMgO layers in high efficiency chalcogenide solar cells

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Raman scattering quantitative assessment of the anion composition ratio in Zn(O,S) layers for Cd-free chalcogenide-based solar cells

Cited by 14 publications

References 27 publications

High Order Oxygen Local Vibrational Modes in ZnS1−xOx

High Order Oxygen Local Vibrational Modes in ZnS1−xOx

Advanced Raman Spectroscopy of Methylammonium Lead Iodide: Development of a Non-destructive Characterisation Methodology

Resonant Raman scattering based approaches for the quantitative assessment of nanometric ZnMgO layers in high efficiency chalcogenide solar cells

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Product

Resources

About

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x

High Order Oxygen Local Vibrational Modes in ZnS_1−xO_x