How is band gap in amorphous material evaluated ?

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Kranthi Kumar

I came to know that the concept of mobility edges gives bandgap in these solid

can anyone give insitu details about what is mobility edge ?

Anil Kumar

In amorphous semiconductors (such as a-Silicon), optical band gap can be estimated from UV-Vis-NIR spectroscopy measurements. From absorption data, TAUC plot is drawn and optical band gap energy is estimated. It is a standard process for amorphous semiconductor materials and equipment is a simple UV-Vis spectrophotometer.