Charged defects-controlled conductivity in Ge-ln-Se glasses |
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Authors: | Sudha Mahadevan A Giridhar |
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Affiliation: | (1) Materials Science Division, National Aeronautical Laboratory, 560017 Bangalore, India |
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Abstract: | The variation of the d.c. electrical conductivity, , with composition and temperature was investigated for glasses of the Ge-In-Se system. The results indicate a decrease in the activation energy for electrical conductivity, E, and an increase in on introduction of indium into Ge-Se glasses. The changes in E and with composition (selenium content in the glasses) are identical for the Gex In5 Se95–x and Gex In8Se92–x families. The results have been traced to the conduction controlled by charged defects in these chalcogenide glasses. The changes in E and have been explained by a shift in the Fermi level, being brought by the introduction of indium. |
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