Year: 2024
Type: article
Abstract: Optical measurements were carried out on bulk glasses Ge x Se 1-x (x = 10, 17, 22, 25, 33).The direct band gap values were determined from the experimental data.Theoretical model is introduced which fits on the data.Compositional dependent power (p = 0.03) on band gap data across the Ge x Se 1-x series is determined.Duffy's relation is also explored to estimate the optical energy band gap which fairly matches with experimental band gap.Correlation graph between optical energy band gap (E g ) and (1-R M / V M ) shows a new relationship Eg = 7.58(1-R M /V M ) 1.08 .We are introducing the new concept of modified compactness for covalent glasses and composition dependent compactness across Ge x Se 1-x glasses are understood.Physical parameters were also obtained such as chemical bond energy modification and cross-linking density (rigidity) in order to support the explanation of the optical band gap.
Author: Deepak Sharma
Institution: Chaudhary Charan Singh University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4408207168