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<strong>Conduction mechanism and defect density of states in amorphous Te15 (Se100-xBix)85 glassy alloys</strong>

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Authentication Code dc
 
Title Statement <strong>Conduction mechanism and defect density of states in amorphous Te15 (Se100-xBix)85 glassy alloys</strong>
 
Added Entry - Uncontrolled Name kumar, Kameshwar ; MLSM PG College Sundernagar HP
Thakur, Nagesh ; HP University Shimla
 
Uncontrolled Index Term material science,synthesis and characterization
Chalcogenide glasses; Space charge limited conduction; Localized states; Density of states
 
Summary, etc. The present paper reports the dc conductivity measurement up to 100 V for pallets of Te<sub>15 </sub>(Se<sub>100-x</sub>Bi<sub>x</sub>)<sub>85</sub> (x=0, 1, 2, 3, 4 at %) glassy alloys in temperature range (303-343 K). The dc conductivity is calculated from the I-V characteristics curves of the pellets of bulk samples prepared by melt quenching technique. The samples obey Ohm’s law in the lower (0-25 V) voltage range whereas the behaviour in the higher (25-100 V) voltage range is non-ohmic. The experimental results for all the samples fit well with the theory of space charge limited conduction SCLC for uniform distribution of localized states in the mobility gap. The density of defect states is calculated for the glassy alloys and is found to increase with Bi content. The increase in defect density of states can be explained on basis of electro negativity difference of Bi as compared to host elements. The increase in dc conductivity is probably due to Se-Bi bond concentration in the Se-Te-Bi glasses.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2020-05-14 13:11:01
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/27645
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 58, ##issue.no## 3 (2020): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/27645/465485335
 
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