I have a Tauc's plot which is curve shaped. I am wondering where to draw a straight line to measure (bandgap) energy? Your suggestions are welcome and appreciated. The material is AgInS2-ZnS.
Thanks for the reply. Is there any rigid way of drawing this straight line? Because we can pick any point in this curve and a draw a tangent line that can give different values, right?
Firstly you have draw your UV Vis spectroscopy data plot, after absorption spectra show at e.g 300 the you have calculate it E = hv/lemda, mean 1240/300 then energy band gap approximately 4.13eV so you sketch the it 4.13. if you mind you can open my research article