Infrared spectrum of NaNO3—I. Longitudinal and transverse internal modes

Eckhardt, R.; Eggers, D. F.; Slutsky, L. J.

doi:10.1016/0584-8539(70)80143-x

Cited by 19 publications

(4 citation statements)

References 14 publications

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“…To determine if the nitrate ions are present as sodium nitrate, nickel nitrate or just free ions, additional characterization by FT-IR spectrometry was performed as shown in Figure 3c. The only peak that matches to the FT-IR spectrum of the sf-NiO x , corresponds to the ν3 vibration mode of the nitrate ions in the sodium nitrate, 44 which is in agreement with the previous identification of sodium by EDS. This suggest that the amorphous phase is formed not only by unreacted Ni(OH) 2 but also by chemisorbed Na + and NO 3 − ions.…”

Section: ■ Results and Discussionsupporting

confidence: 90%

Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Ciro

Ramírez

Escobar

et al. 2017

ACS Appl. Mater. Interfaces

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Fabrication of solution-processed perovskite solar cells (PSCs) requires the deposition of high quality films from precursor inks. Frequently, buffer layers of PSCs are formed from dispersions of metal oxide nanoparticles (NPs). Therefore, the development of trustable methods for the preparation of stable colloidal NPs dispersions is crucial. In this work, a novel approach to form very compact semiconducting buffer layers with suitable optoelectronic properties is presented through a self-functionalization process of the nanocrystalline particles by their own amorphous phase and without adding any other inorganic or organic functionalization component or surfactant. Such interconnecting amorphous phase composed by residual nitrate, hydroxide, and sodium ions, proved to be fundamental to reach stable colloidal dispersions and contribute to assemble the separate crystalline nickel oxide NPs in the final film, resulting in a very homogeneous and compact layer. A proposed mechanism behind the great stabilization of the nanoparticles is exposed. At the end, the self-functionalized nickel oxide layer exhibited high optoelectronic properties enabling perovskite p-i-n solar cells as efficient as 16.6% demonstrating the pertinence of the presented strategy to obtain high quality buffer layers processed in solution at room temperature.

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Section: ■ Results and Discussionsupporting

confidence: 90%

Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Ciro

Ramírez

Escobar

et al. 2017

ACS Appl. Mater. Interfaces

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“…The NO 3 - ions lie in parallel planes. The unit cell spectroscopic analyses of Eckhardt et al of the two nitrate groups show that the antisymmetric stretching vibrations that characterize the isolated ions, of type ν 3 (e‘), couple to give two doubly degenerate vibrational modes. One, ν 3 (e u ), is infrared active with transition dipoles directed orthogonal to the trigonal axis of the rhombohedral unit cell.…”

Section: Discussionmentioning

confidence: 99%

“…Spectrum a is the absorption derived using optical constants obtained from reflection measurements from a face of single-crystal NaNO 3 . 28,29 The middle spectrum, b, is transferred from Figure 3, a typical spectrum of nitrate produced by HNO 3 reaction on NaCl(100). Absorption by a thin film of a dilute NaNO 3 solution from Figure 7 is spectrum c.…”

Section: Discussionmentioning

confidence: 99%

“…In Figure , we have collected a number of NO 3 - spectra in the ν 3 region from a variety of sources. Spectrum a is the absorption derived using optical constants obtained from reflection measurements from a face of single-crystal NaNO 3 . , The middle spectrum, b, is transferred from Figure , a typical spectrum of nitrate produced by HNO 3 reaction on NaCl(100). Absorption by a thin film of a dilute NaNO 3 solution from Figure is spectrum c.

8 Spectroscopic signatures of the NO 3 - in different environments.…”

Section: Discussionmentioning

confidence: 99%

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Infrared Spectroscopic Investigation of the Heterogeneous Reaction of HNO₃ and NaCl(100)

Sporleder

Ewing

2001

J. Phys. Chem. A

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We have monitored the reaction of HNO3 with the NaCl(100) faces of single crystals in the presence of minute water concentrations. The reaction produces NaNO3 crystallites or ribbons atop the NaCl(100) face, indicating that a surface reorganization occurs upon exposure to water vapor concentrations as low as 0.02 mbar. The crystalline nature of the NaNO3 is established by the well-defined longitudinal-transverse (LO-TO) splitting of the NO3 - stretching vibrations. After an average coverage of 10 to 30 layers of crystalline NaNO3, the reaction becomes diffusion limited, but shows no signs of stopping.

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A Study of the Phase Transition in the System [Ag_1−x(Na)_x]NO₃ by Infrared Spectroscopy

El-Kabbany¹,

Badr²,

Taha³

et al. 1989

Annalen der Physik

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A b s t r a c t . A complete infrared study of the mixed crystal system of AgNO, and NaNO, is carried out in the region 400-4000 em-'. The study includes internal fundamental normal vibrations of the NO-, ion in the ordered and disordered phases of AgNO, a t different values of the sodium concentration, the I.R. spectrit, spectral band shape intensities, and frequencies of t h r intrrnal modes as functions of the sodium ion concentration. Special attcntion is paid to bending mode, combination mode, asymmetric stretching mode, and over-tone. The rotation$ energy barrier is determined a t different concentrations of the sodium ions in the systrm. Eine Untersuchung der Phaseniibergange im System [Agl-,(Na),]NOs mittels InfrarotspcktroskopieI n h a l t s iibersicht. Es wird eine vollstandige IR-Untrrsurhitng drs Misc1ikrist;~llsystems aus AgNO, und NaNO, im Brreich zwischen 400 und 4000 rm-l durchgrfuhrt. Sie umfnI3t die inneren Grundschwingungen des NO-,-Ions in der geordneten nnd ungeordnetcn AgN0,-Phase und die 1R-Spektrencharakteristika bei unterschiedlichrn Na-Konzentrstionen. Dir Rotntionsencrgirbarrirre wird fur unterschiedliche Na-Konzentrationen im System bestimmt.

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Infrared spectrum of NaNO3—I. Longitudinal and transverse internal modes

Cited by 19 publications

References 14 publications

Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Infrared Spectroscopic Investigation of the Heterogeneous Reaction of HNO₃ and NaCl(100)

A Study of the Phase Transition in the System [Ag_1−x(Na)_x]NO₃ by Infrared Spectroscopy

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Infrared spectrum of NaNO3—I. Longitudinal and transverse internal modes

Cited by 19 publications

References 14 publications

Self-Functionalization Behind a Solution-Processed NiOx Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Self-Functionalization Behind a Solution-Processed NiOx Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Infrared Spectroscopic Investigation of the Heterogeneous Reaction of HNO3 and NaCl(100)

A Study of the Phase Transition in the System [Ag1−x(Na)x]NO3 by Infrared Spectroscopy

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Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Self-Functionalization Behind a Solution-Processed NiO_x Film Used As Hole Transporting Layer for Efficient Perovskite Solar Cells

Infrared Spectroscopic Investigation of the Heterogeneous Reaction of HNO₃ and NaCl(100)

A Study of the Phase Transition in the System [Ag_1−x(Na)_x]NO₃ by Infrared Spectroscopy