Study of optical absorption in TlGaSe2:Zn2+ single crystals

Makhnovets, Ganna; Myronchuk, G.L.; Піскач, Л. В.; Vidrynskyi, B.; Kevshyn, A. H.

doi:10.3116/16091833/19/1/49/2018

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…Both parameters, the steepness and Urbach energy, increase with the sample temperature in the range 100-300 K (Table 1). These results are consistent with data reported in the literature [28,[35][36][37][38].…”

Section: Resultssupporting

confidence: 93%

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Phase diagram of the TlGaS2–CdS system and optical properties of a TlGaS2:Cd2+ crystal

Піскач¹,

Myronchuk²,

Makhnovets³

2017

Chem. Met. Alloys

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The phase diagram of the TlGaS 2-CdS system is of the eutectic type, with the coordinates 1021 K, ∼ ∼ ∼ ∼80 mol.% TlGaS 2 / ∼ ∼ ∼ ∼20 mol.% CdS. The solid solubility of the components is less than 5 mol.% at 670 K. The optical properties of a single crystal of composition 98 mol.% TlGaS 2 / 2 mol.% CdS, grown by the Bridgman method, were investigated. Absorption measurements were performed in the 100-300 K range with 50 K increments. The bandgap energies for direct (E gd) and indirect (E gi) transitions in TlGaS 2 :Cd 2+ were calculated as a function of temperature. They were found to be 2.38 and 2.32 eV at 100 K, and 2.27 and 2.2 eV at 300 K, i.e. the bandgap for indirect optical transitions is smaller than the bandgap for direct transitions. The values of the direct and indirect bandgap energies decrease with increasing temperature, whereas the steepness parameter and Urbach energy increase with increasing temperature in the range 100-300 K. The Urbach energy was calculated as 163 meV at 100 K and 239 meV at 300 K.

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Section: Resultssupporting

confidence: 93%

“…In either case, the bandgap energy decreases with increasing temperature. These results are consistent with previous studies [36][37][38]. The direct and indirect temperature coefficients for TlGaS 2 :Cd 2+ , calculated from Eq.…”

Section: Resultssupporting

confidence: 93%

Phase diagram of the TlGaS2–CdS system and optical properties of a TlGaS2:Cd2+ crystal

Піскач¹,

Myronchuk²,

Makhnovets³

2017

Chem. Met. Alloys

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“…In the above equation, K B and T are Boltzman's constant in eV and absolute temperature, respectively. The Steepness parameter provides us with information about the expansion of the absorption edge due to the interaction of electrons with phonons [45] . The σ value of the novel DSNA crystal is found to be 0.090.…”

Section: Morphology Within the Dsna Crystalmentioning

confidence: 99%

Physicochemical and Nonlinear Optical Properties of a Stilbazolium Family Single Crystal with Third Order Nonlinear Optical Activity

Anand

Rani

2023

ChemPhotoChem

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The idea of incorporating a novel counter anion group with the organic stilbazolium cation (C16H19N2+) yields a new third harmonic generation active single crystal of 4‐[2‐(4‐Dimethylamino‐phenyl)‐vinyl]‐1‐methyl‐pyridinium 2‐Nitroaniline‐4‐sulfonate (DSNA). The slow evaporation solution growth technique is employed to obtain DSNA crystals, whose nonlinear responses are analyzed through a continuous wave laser Z scan experiment. The thermally induced strong reverse saturation absorption and self‐defocusing behaviour of DSNA crystal infers the aptness of the material as an optical limiting device. Optical characterization outcomes imply that the lower absorption edge falls in the visible region (530 nm), with a broad transparency range of 0.53 to 1 μm. Exploration of other optical constants, extinction coefficient (k = 10‐4), emission wavelength (620 nm – red light), optical (σopt = 1010 Ωm‐1) and electrical conductivity (σelc = 1011 Ωm‐1) also concludes that DSNA crystal is a possible applicant for optoelectronic devices. The various bonds and corresponding lengths and angles involved in the formation of DSNA ionic crystal are evaluated by means of the Single Crystal X‐Ray Diffraction (SCXRD) technique. Linear and nonlinear optical property findings undoubtedly affirm that the titular DSNA crystal is an effectual Nonlinear Optical (NLO) crystal.

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“…are of scientific interest for modern optoelectronics and are intensively investigated [1][2][3][4][5][6][7][8][9][10][11]15].…”

Section: Introductionmentioning

confidence: 99%

Phasing Diagrams TlGaSe2 - CuGaSe2 and TlInS2 - CuInS2 Systems

Matiev¹,

Uspazhiev²,

Khamkhoev³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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According to the data of differential thermal, X-ray phase analyzes, as well as measurements of conductivity and pycnometric density, phase equilibriums were studied and phasing diagrams of TlInS2-CuInS2 and TlGaSe2-CuGaSe2 systems were created in the entire concentration range. The studied systems are quasi-binary with limited mutual solubility of the components in the solid state. The interaction in the TlGaSe2-CuGaSe2 system occurs with the formation of one eutectic and one peritectic points, in the TlInS2 system-CuInS2 with the formation of one eutectic and two peritectic points. Eutectic at 1048 K corresponds to 18 mol. % CuGaSe2 and at 945 K 17-mol. % CuInS2. Solid solutions based on CuGaSe2, CuInS2, like the initial compounds themselves, undergo phase transformations. It is found that in these systems limited solid solutions are formed, which make up 1.5 mol. % at indoor temperature on TlGaSe2 and 0.5 mol. % on CuGaSe2 in the TlGaSe2-CuGaSe2 system, as well as 1.5 mol. % on TlInS2 and 0.5 mol. % on CuInS2 in the TlInS2-CuInS2 system. The nature of the interactions of the components makes it possible to assign the presented phasing diagrams to type VI according to Rooseboom.

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Study of optical absorption in TlGaSe2:Zn2+ single crystals

Cited by 18 publications

References 34 publications

Phase diagram of the TlGaS2–CdS system and optical properties of a TlGaS2:Cd2+ crystal

Phase diagram of the TlGaS2–CdS system and optical properties of a TlGaS2:Cd2+ crystal

Physicochemical and Nonlinear Optical Properties of a Stilbazolium Family Single Crystal with Third Order Nonlinear Optical Activity

Phasing Diagrams TlGaSe2 - CuGaSe2 and TlInS2 - CuInS2 Systems

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