A comparative investigation of structural and optical properties of annealing modified mullite bismuth ferrite

Studies of Structural, Optical, and Electrical Properties of Eco‐Friendly Complex Ferroelectrics: BaTiO3–Bi0.5Na0.5TiO3

“…The value of the exponent n can be 1/2, 2, 2/3, and 1/3 for allowed indirect, allowed direct, forbidden direct, and forbidden indirect transitions, respectively. [ 26,27 ] For BT, allowed indirect transition should be considered. [ 28,29 ]…”

“…The value of the exponent n can be 1/2, 2, 2/3, and 1/3 for allowed indirect, allowed direct, forbidden direct, and forbidden indirect transitions, respectively. [26,27] For BT, allowed indirect transition should be considered. [28,29] The plots between (αhν) 1/2 and incident photon energy (hν) are represented in Figure 4c; which give the bandgap energy (E g ) by regressing the linear part of the plotted lines Table 2.…”