It is established that direct extrapolation technique has the potential to either under - or over-estimate bandgap values, whereas the proper extrapolation method is promising for more reasonable values of optical energy gap.Jubu, P. R.Yam, F. K.Igba, V. M.Beh, K. P....
They are (i) the scale of the Tauc plot, and (ii) the method of extrapolation of the energy gap value to the x-axis. Apparently, these two additional factors influencing the bandgap value are not related to the nanomaterial’s synthesis technique, instrument measurement technique or other ...