Local atomic structure and electrical properties of Ge20Se80−xTex (x=0, 5, 10, and 15) glasses doped with Ho

Kubliha, Marián; Костка, П.; Trnovcová, V.; Zavadil, J.; Bednarčı́k, J.; Labaš, Vladimír; Pedlikova, J.; Dippel, Ann‐Christin; Liermann, Hanns‐Peter; Psota, Jozef

doi:10.1016/j.jallcom.2013.10.059

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…Hopping of small polarons between different valence states of these elements can be considered as the cause of conduction in these glasses [7]. The electrical conductivity of various glasses containing TMI has been investigated by many researchers [2,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Electrical Relaxation Studies of Chalcogenide xAg2S–(1-x) (0.5S–0.5Te) Glassy System

Ojha¹,

Roy²,

Chamuah³

et al. 2020

IJASE

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Section: Introductionmentioning

confidence: 99%

Electrical Relaxation Studies of Chalcogenide xAg2S–(1-x) (0.5S–0.5Te) Glassy System

Ojha¹,

Roy²,

Chamuah³

et al. 2020

IJASE

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“…Therefore, Se-Te alloys has been exposed to be improved properties in terms of crystallization, transmittance, hardness, ageing, than the pure form of Se and Te. [16][17][18][19][20][21][22][23][24][25][26][27] Se-Te -based chalcogenide glasses is supposed to be a stimulating glass due to its important applications nevertheless, it has low sensitivity and small lifetime consequently numerous researchers have engaged definite additives such as Ge, Bi and Sn. The adding of the third element might increase thermal stability, generate topological and chemical disorder in Te-Se alloys 28,29 .…”

Section: Introductionmentioning

confidence: 99%

Optical Parameters of Amorphous Ge-Te-Se Films from Ellipsometric Measurements

Alomairy¹

2020

Orient. J. Chem

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In present work, Variable Angle Spectroscopic Ellipsometer (VASE) is used to determine the optical properties of thermally evaporated thin films Se 15 Te 62.5 Ge 22.5 and Se 10 Te 67.5 Ge 22.5 from 0.8 to 5.1 eV. The experimental data of VASE parameters were fit using two group of models to extract the dielectric function. First group consist from mixtures of several Gaussian, and one Tauc-Lorentz (TL group ). The other group is a mixed from several Gaussian and one Cody-Lorentz dispersion functions (CL group). The models' factors such as resonance, optical band gap, Urbach energies, oscillator's amplitude and width for both Se 15 Te 62.5 Ge 22.5 and Se 10 Te 67.5 Ge 22.5 films were estimated. Extinction coefficients and refractive indices as function of photon energy of the films were calculated. Both models perform very equally and precisely adequate to the experimental data. However the CL model shows a good accuracy in recounting dielectric function at the beginning absorption area.

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“…In addition, this composition contains large percentage of Se and Te which could be used in memory and switching devices [21]. Addition of the third element Ge to Se and Te, it could improve sensitivity, crystallization temperature as well as reduces ageing effects [22]. Furthermore, Ge strengthens the average bond in this system by cross-linking Se-chain structure, thereby enhancing the glass transition temperature and bond energy [23].…”

Section: Introductionmentioning

confidence: 99%