Figure 5
(a) Temperature dependent transmittance spectra of KN-quartz film. (b) An enlarged spectral region near the absorption edge for KN-quartz film at different temperatures. (c) Plots of (αhν)2 νs. the photon energy for the estimation of direct optical band gap energies for KN-quartz film at 10 and 300 K. Note that the inset in (c) is the temperature dependent E g of KN-quartz film and the schematic representation of the electronic band structure of KN.
