Calibration of IR Absorbance in Highly Nitrogen Doped Silicon

Infrared absorption spectra of highly nitrogen doped multicrystalline float zone silicon are reported. By measuring the nitrogen content in silicon using SIMS, a calibration function of the IR absorption coefficient at 963 cm-1(T = 300 K) and the nitrogen concentration is deduced:cN= (1.29 ± 0.05)×1017cm2α963. The calibration factor is 30 % less than the calibration factor reported by Y. Itoh et al. [Appl. Phys. Lett. 47 (1985) 488].

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Study of the Infrared Absorption Spectra of Some Pyridine Derivatives-Iodine Complexes

Applied Spectroscopy ◽

10.1366/000370276774456273 ◽

1976 ◽

Vol 30 (2) ◽

pp. 200-204 ◽

Cited By ~ 2

Author(s):

F. M. Abdel Kerim ◽

F. Abou El Fotouh

Keyword(s):

Complex Formation ◽

Absorption Spectra ◽

Infrared Absorption ◽

Ir Absorption ◽

Pyridine Derivatives ◽

Thermodynamic Constants ◽

Ir Absorption Spectra ◽

Infrared Absorption Spectra ◽

The Stability ◽

Iodine Complexes

The ir absorption spectra of some pyridine derivatives-iodine complexes were measured in the region 400 to 1400 cm−1 and the results are discussed. The effect of complex formation on the intensities of some of the bands was investigated. The thermodynamic constants of these complexes were calculated. It was found that the stability of the complex depends to a large extent on the electronegativity as well as the position of the substituent on the pyridine nucleus. The structures of formed complexes are discussed.

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Light-induced absorption and optical damage in Sc-, Mg-, and Zn-doped near-stoichiometric LiNbO3

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863518500303 ◽

2018 ◽

Vol 27 (03) ◽

pp. 1850030 ◽

Cited By ~ 1

Author(s):

Junsheng Li ◽

Youwen Liu ◽

Huijie Zhang ◽

Liangzun Tang ◽

Chongjun He

Keyword(s):

Steady State ◽

Lithium Niobate ◽

Absorption Coefficient ◽

Ultraviolet Light ◽

Infrared Absorption ◽

Doping Level ◽

Doping Concentration ◽

Weak Absorption ◽

Induced Absorption ◽

Infrared Absorption Spectra

By measuring the ultraviolet-light-induced absorption in Sc-, Mg- and Zn-doped near-stoichiometric lithium niobate (LiNbO[Formula: see text], we find that the steady-state ultraviolet-light-induced absorption coefficient changes with respect to the doping concentration. There is a strong ultraviolet-light-induced absorption when doping concentration is below its photorefractive threshold and a really weak absorption when the crystal is highly doped. We also use OH[Formula: see text] infrared absorption spectra and the transmitted light spot distortion method to verify the result. Thus, we can determine if the doping level in these doped near-stoichiometric LiNbO3 crystals is above or below their photorefractive threshold by measuring the ultraviolet-light-induced absorption.

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Infrared Absorption Spectra and Their Correlation with the Ti-O Bond Length Variations for TiO2 (Rutile), Na-Titanates, and Na-Titanosilicate (Natisite, Na2TiOSiO4)

Applied Spectroscopy ◽

10.1366/0003702953965786 ◽

1995 ◽

Vol 49 (11) ◽

pp. 1646-1651 ◽

Cited By ~ 22

Author(s):

Gow-Weng Peng ◽

Shou-Kang Chen ◽

Hok-Shing Liu

Keyword(s):

Bond Length ◽

Absorption Spectra ◽

Infrared Absorption ◽

Ir Absorption ◽

Crystalline Solids ◽

Absorption Bands ◽

Structural Units ◽

Structure Correlations ◽

Geometric Setting ◽

Infrared Absorption Spectra

The mid-infrared absorption spectra (400–1200 cm−1) of four TiO2-bearing crystalline solids, in the form of rutile (TiO2), Na-titanates (Na2Ti6O13/ Na2Ti3O7), and natisite (Na2TiOSiO4), are presented, providing a clear illustration of their differences in IR band structure (band pattern). Two sharp characteristic peaks of IR absorption bands of natisite have been noted at 725 and 624 cm−1, representing the internal vibration modes of TiO5 (normal) and SiO4 structural units, respectively, and obtainable by comparison with that of Ca-titanosilicate (CaTiOSiO4), NTS glass (Na2O-TiO2-SiO2), and low-cristobalite (SiO2). The tested series of TiO2-bearing crystalline solids has been helpful in presenting a case study in support for the generalization of IR spectra/structure correlations, showing that vibrational spectroscopy can be useful for understanding the crystal chemistry of crystalline solids in terms of the geometric setting of molecular structural units and chemical bonds. It has been qualitatively demonstrated that the Ti-O bond length variations may be broadly correlated with the complexity of IR absorption bands of four TiO2-bearing solids having great diversity in both chemical composition and crystalline structure.

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Phonon resonances and infrared absorption due to interstitial F− ions and substitutional trivalent cations

Canadian Journal of Physics ◽

10.1139/p80-110 ◽

1980 ◽

Vol 58 (6) ◽

pp. 803-811 ◽

Cited By ~ 4

Author(s):

M. A. H. Nerenberg ◽

J. Govindarajan ◽

P. W. M. Jacobs ◽

T. M. Haridasan

Keyword(s):

Absorption Coefficient ◽

Absorption Spectra ◽

Infrared Absorption ◽

Reasonable Agreement ◽

Interstitial Site ◽

Trivalent Cation ◽

Site Symmetry ◽

Function Formulation ◽

Trivalent Cations ◽

Infrared Absorption Spectra

A Green's function formulation is developed to compute the phonon resonances of an F− interstitial perturbed by the presence of a trivalent cation which occupies one of the second neighbour sites of the interstitial in BaF2, the interstitial site symmetry being thereby reduced from Oh to C4v. Expressions for the absorption coefficient are obtained for the case of an isolated interstitial and for that of the interstitial with an adjacent trivalent cation. These expressions are evaluated for both the isolated interstitial and for Fi− associated with Y3+, Gd3+, or La3+. There is reasonable agreement between theory and the experimentally observed infrared absorption spectra measured by Morlot, Hadni, Villermain-Lecollier, and Strimer.

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