Infrared-active modes in Ag3Ga5S9 and Ag3In5S9 single crystals: An influence of trivalent cation substitution

Date

2016-01-01

Author

Hasanlı, Nızamı

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

135
views

0
downloads

Infrared reflection spectra are registered in the frequency range of 50-2000 cm(-1) for Ag3Ga5S9 and Ag3In5S9 single crystals grown by Bridgman method. Four infrared-active modes are detected in spectra. By replacing the gallium atoms by indium ones in Ag3Ga5S9 crystal, the observed bands shift to low frequencies. Spectral dependence of optical parameters; real and imaginary parts of the dielectric function, the function of energy losses, refractive index, absorption index and absorption coefficient were calculated from reflectivity experiments. The frequencies of transverse and longitudinal optical modes and oscillator strength were also determined. The highest frequency bands observed in an infrared spectra of studied crystals were tentatively assigned to the antiphase vibration of the trivalent cation and anion sublattices. (C) 2016 Elsevier GmbH. All rights reserved.

Subject Keywords

Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

URI

https://hdl.handle.net/11511/46857

Journal

OPTIK

DOI

https://doi.org/10.1016/j.ijleo.2016.05.020

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Optical constants of silver and copper indium ternary sulfides from infrared reflectivity measurements Hasanlı, Nızamı (Elsevier BV, 2016-03-01) Infrared reflection spectra are obtained in the frequency range of 50-2000 cm(-1) for AgIn5S8 and CuIn5S8 single crystals grown by Bridgman method. All four infrared-active modes are detected, which are in full agreement with the prediction of group-theoretical analysis. Spectral dependence of optical parameters; real and imaginary parts of the dielectric function, the function of energy losses, refractive index, absorption index and absorption coefficient were calculated from reflectivity experiments. The ...
Optical constants of Tl4Ga3InSe8 layered single crystals Goksen, K.; Hasanlı, Nızamı (Elsevier BV, 2007-11-15) The optical properties of Tl(4)Ga(3)lnSe(8) layered single crystals have been studied by means of transmission and reflection measurements in the wavelength range of 500-1100 run. The analysis of the room temperature absorption data revealed the presence of both optical indirect and direct transitions with band gap energies of 1.94 and 2.20 eV, respectively. Transmission measurements carried out in the temperature range of 10-300 K revealed that the rate of change of the indirect band gap with temperature i...
Multiphonon absorption processes in layered structured TlGaS2, TlInS2 and TlGaSe2 single crystals IŞIK, MEHMET; Hasanlı, Nızamı; KORKMAZ ÖZKAN, FİLİZ (Elsevier BV, 2013-07-15) The infrared transmittance and Raman scattering spectra in TlGaS2, TlInS2 and TlGaSe2 layered single crystals grown by Bridgman method were studied in the frequency ranges of 400-1500 and 10-400 cm(-1), respectively. Three, three and five bands observed at room temperature in IR transmittance spectra of TlGaS2, TlInS2 and TlGaSe2, respectively, were interpreted in terms of multiphonon absorption processes. (C) 2013 Elsevier By. All rights reserved.
Electrical characteristics of organic heterojunction with an alternating benzotriazole and fluorene containing copolymer Gullu, H.H.; Yildiz, D.E.; Toppare, Levent Kamil; Çırpan, Ali (Springer Science and Business Media LLC, 2020-01-01) The current–voltage (I−V) and capacitance–voltage (C−V) characteristics of the organic heterojunction diode were investigated in a wide temperature range from 80 to 320 K and frequency range from 10 kHz to 1 MHz, respectively. Alternative to the copolymer partner poly(3-hexylthiophene) (P3HT) to [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), poly((9,9-dioctylfluorene)-2,7-diyl-(4,7-bis(thien-2-yl)2-dodecyl-benzo[1,2,3]triazole)) (named as copolymer in this work) was adapted to the bulk-heterojunction la...
Metal mesh filters based on Ti, ITO and Cu thin films for terahertz waves Demirhan, Y.; Alaboz, H.; ÖZYÜZER, LÜTFİ; Nebioglu, M. A.; Takan, T.; Altan, Hakan; Sabah, C. (Springer Science and Business Media LLC, 2016-02-01) In this study, we have investigated the spectral performance of resonant terahertz (THz) bandpass filters which were produced from thin films with a metal-mesh shape. The aforementioned filters were fabricated from titanium, copper and indium tin oxide thin films on fused silica substrates by UV lithography with an array of cross-shaped apertures. Since the mesh period, cross-arm length and its width specify the spectral characteristics of the filters, we were able to reveal the performance of these filters...

Citation Formats

N. Hasanlı, “Infrared-active modes in Ag3Ga5S9 and Ag3In5S9 single crystals: An influence of trivalent cation substitution,” OPTIK, pp. 6858–6861, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46857.