First and Second Order Raman Scattering in CuBr and CuI

Prevot, B.; Sieskind, M.

doi:10.1002/pssb.2220610264

Cited by 7 publications

(4 citation statements)

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“…Results are shown in Figure , along with spectra of pure reference compounds CuI and Cu 2 O. The only signal for CuI (curve a) is pointed out around 123 cm -1 (fundamental TO mode) and that of Cu 2 O (curve b) is located at about 219 cm -1 . The spectrum of sample treated at pH 6.1 (curve c) reveals the presence of these signals with maxima pointed out at 121 and 218 cm -1 , arguing for the presence of CuI at the Cu 2 O surface.…”

Section: Resultsmentioning

confidence: 98%

Sorption of Iodide on Cuprite (Cu₂O)

et al. 2000

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The interactions of iodide ions with cuprite (Cu2O) surfaces were studied by combining batch experiments and surface analyses. The evolution of iodide uptake with pH was investigated. The thermodynamical calculations and surface analyses (X-ray photoelectron spectroscopy, scanning electron microscopy, Raman spectroscopy, and electrochemistry) were used to show that two different pH-dependent mechanisms are responsible for the accumulation of the iodide species on Cu2O. At pH values lower than 6.5, the precipitation of CuI occurs on the cuprite surface, while in more alkaline medium, the iodide adsorption takes place by substituting the surface hydroxyl groups of Cu2O. The sorption processes were not affected by a 1000-fold excess of chloride ions, but they were limited to the potential range corresponding to the stability domain of Cu2O (i.e., between −10 and +190 mV/ENH at pH 8); thus no accumulation was observed either on metallic copper or on CuO.

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Section: Resultsmentioning

confidence: 98%

Sorption of Iodide on Cuprite (Cu₂O)

et al. 2000

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“…In Ref. the intensity of overtones and summation bands was found weak. Hydrogen related local vibrational modes (LVM) could not be found in CuI (but for CuCl) after proton implantation as reported in Ref.…”

Section: Structural Properties Of Cuimentioning

confidence: 90%

Cuprous iodide - a p-type transparent semiconductor: history and novel applications

Grundmann

Schein

Lorenz

et al. 2013

Phys. Status Solidi A

253

313

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Halide semiconductors stand at the very beginning of semiconductor science and technology. CuI was reported as the first transparent conductor, and the first field effect transistor was made from KBr. Although halogens are frequently used in semiconductor preparation, little use is currently made from halide semiconductors in electronics and photonics. We review past reports on the metal halide semiconductor CuI and related alloys and discuss recent progress with regard to this material including its use in organic electronics and solar cells as well as our own work on fully transparent bipolar heterostructure diodes (p‐CuI/n‐ZnO) with high rectification of several 107 and ideality factors down to 1.5. γ‐CuI(111) thin film on glass (1 × 1 cm2) and IV‐characteristics of p‐CuI/n‐ZnO/a‐Al2O3 bipolar heterojunction diode.

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“…Information regarding CuI's acoustic phonons is up to now only available via neutron scattering at 90 K and RT [17] and as best of knowledge of the authors, there exist only one short report of the second-order Raman spectrum up to now [18]. The accuracy of 5 cm −1 is comparable to reported shifts of phonon energies with temperature.…”

Section: Introductionmentioning

confidence: 93%

“…The accuracy of 5 cm −1 is comparable to reported shifts of phonon energies with temperature. Also a systematic deviation of respective determined acoustic phonons cannot be excluded, as found for the optical zone-center phonons when compared to Raman scattering results [18,19]. These uncertainties are significant and not addressed despite the recent research interest in this material.…”

Section: Introductionmentioning

confidence: 94%

Determination of acoustic phonon anharmonicities via second-order Raman scattering in CuI

Hildebrandt,

Seifert,

George

et al. 2023

New J. Phys.

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We demonstrate the determination of anharmonic acoustic phonon properties via second-order Raman scattering exemplarily on copper iodide single crystals. The origin of multi-phonon features from the second-order Raman spectra was assigned by the support of the calculated 2-phonon density of states. In this way, the temperature dependence of acoustic phonons was determined down to 10 K. To determine independently the harmonic contributions of respective acoustic phonons, density functional theory in quasi-harmonic approximation was used. Finally, the anharmonic contributions were determined. The results are in agreement with earlier publications and extend CuI’s determined acoustic phonon properties to lower temperatures with higher accuracy. This approach demonstrates that it is possible to characterize the acoustic anharmonicities via Raman scattering down to zero-temperature renormalization constants of at least 0.1 cm−1.

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First and Second Order Raman Scattering in CuBr and CuI

Cited by 7 publications

References 7 publications

Sorption of Iodide on Cuprite (Cu₂O)

Sorption of Iodide on Cuprite (Cu₂O)

Cuprous iodide - a p-type transparent semiconductor: history and novel applications

Determination of acoustic phonon anharmonicities via second-order Raman scattering in CuI

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First and Second Order Raman Scattering in CuBr and CuI

Cited by 7 publications

References 7 publications

Sorption of Iodide on Cuprite (Cu2O)

Sorption of Iodide on Cuprite (Cu2O)

Cuprous iodide - a p-type transparent semiconductor: history and novel applications

Determination of acoustic phonon anharmonicities via second-order Raman scattering in CuI

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Sorption of Iodide on Cuprite (Cu₂O)

Sorption of Iodide on Cuprite (Cu₂O)