Acoustophotovoltaic effect in TlInSe2, TlInTe2, and TlGaTe2 single crystals

Gojaev, E. M.; Allakhyarov, E. A.; Nazarov, A. M.; Gyul’mamedov, K. D.; Khalilova, Kh. S.; Mamedov, E. M.

doi:10.1134/s0020168507100068

Cited by 3 publications

(2 citation statements)

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“…X-ray diffraction studies were carried out on a Bruker 2D-Phaser X-ray diffractometer. The crystals were characterized by X-ray diffraction methods [22,23]. Raman scattering and luminescence spectra were studied on a three-dimensional confocal Raman microspectrometer Nanofinder 30 (Tokyo Instruments), excitation wavelength λ=532nm.…”

Section: Experimental Partmentioning

confidence: 99%

Optical Properties of Tlinse2<Au> Single Crystals

G.N. Mammadova

2024

jes

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This paper presents the results of studying the surface microrelief in 2D and 3D models and analyzing the spectroscopy of a three-junction TlInSe2<Au> crystal. Analysis of the results obtained showed that with a change in the composition of the TlInSe2<Au> crystal, sharp changes occur in the microrelief of its surface. An X-ray optical diffraction analysis of the TlInSe2<Au> crystal was experimentally carried out. Based on ellipsometric data, optical functions were determined - the real and imaginary parts of the dielectric permittivity of crystals, the coefficients of optical absorption and reflection, the dependence of energy losses and electric field power on the effective density, the spectral dependences of the real (σr) and imaginary (σi) parts, optical electrical conductivity were experimentally studied. The fluorescence spectra of the ternary compound TlInSe2<Au> were isolated and analyzed when excited by light with a wavelength of 532 nm. X-ray studies of TlInSe2<Au> showed that this phase crystallizes into tetragonal systems. Ellipsometric measurements showed that the real (ε1) and imaginary (ε2) parts of the dielectric constant are components of the dielectric constant tensor of the uniaxial joints under consideration and do not depend on the angle. Analysis of the dependence of the real and imaginary parts of the refractive index of the TlInSe2<Au> crystal on photon energy showed that the nature of the change in the real and imaginary parts of the dielectric constant does not differ significantly. When analyzing the spectral dependences of the real (σr) and imaginary (σi) parts of the optical electrical conductivity, it was noticed that the real part of the optical electrical conductivity increases exponentially in the energy range 0.894-3.505 eV. In the energy range of 0.654-2.91 eV, the imaginary part of the optical electrical conductivity increases linearly, reaches a maximum value, and decreases at an energy of 2.91 eV. At 3.6 eV, an inversion of the imaginary part of the optical electrical conductivity of the TlInSe2<Au> compound is observed. From the graphs of the effective power density versus electric field energy losses, it is known that the effective power density increases significantly in the energy range of 0.805–3.52 eV. The fluorescence spectrum of the ternary compound TlInSe2<Au> upon excitation with light with a wavelength of 532 nm has been studied and it has been established that this phase has luminescent properties.

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Section: Experimental Partmentioning

confidence: 99%

Optical Properties of Tlinse2<Au> Single Crystals

G.N. Mammadova

2024

jes

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“…Since kinetic phenomena in semiconductors is heavily dependent on type, quantity and impurity distribution and is very sensitive to such external actions as electric, magnetic, acoustic and temperature fields, deformation and illumination, these processes are the physical basis of numerous transformers used in up-to-date electronic, optical, photoelectric, magnetic, acoustic, strain gauge and piezoelectric devices. Clearly, profound research of new properties of compounds and solid solutions results in the discovery of new effects and possibilities in an advanced instrumentation [15].…”

Section: Introductionmentioning

confidence: 99%

Piezomodulation of Connection Conductance TlInTe<sub>2</sub>

Gojaev¹,

Agaeva²,

Kulieva³

et al. 2016

OJINM

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This paper discusses the development method of strain sensors based on acicular single crystal compound TlInTe 2 is grown by Bridgman-Stockbarger technique. Creating mechanically reliable ohmic contacts on said obtained single crystals was carried out directly by spot welding wires corresponding to the ends of the capacitor discharge heated in a stream of inert gas from the single crystal TlİnTe 2. This method of creating contacts proved effective and reliable. Sensors made by this manner stuck to the calibrated beams of steel thickness of 1 mm, a length of 30 mm and a corresponding optimal regime got sensors with a maximum piezo-sensitivity. It was found that if enshrined at one end of a thin steel sheet with glued crystals TlİnTe 2 initiate periodic mechanical vibrations to the same frequency, occurs conductivity modulation. The effect of piezo-modulation conductance depending on the degree of deformation, illumination in interval of deformation and lux illumination in room temperature were studied. The study showed that the more mechanical deformation and illumination are, the more modulation amplitude is. We studied the modulation of the conductivity of crystals during mechanical deformation values of 8, 14, 19, 23 and 27 × 10 −5 and illuminance 1000, 2750, 4750 and 6500 suites. Investigations the level piezo-signal depending on the amplitude of mechanical vibrations at frequency of 85 Hz, it is found that with increasing magnitude of the mechanical deformation of 7 × 10 −5 and 26 × 10 −5 amplitude increases six times. It is shown that the piezoresistive effect is clearly manifested in dynamic mode. Additional conductivity occurs during mechanical deformation. When the illuminated samples piezoconductivity magnitude increases linearly.

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