Figure 3
From: Tunability of the bandgap of SnS by variation of the cell volume by alloying with A.E. elements
Optical bandgaps estimated by Tauc plots of (αhν)2 (left) and absorption coefficients (right). Results for the (a) Ca-, (b) Sr-, and (c) Ba-alloyed SnS films. Alloying with Ba, which has the largest ionic radius of the A.E. elements except Ra, resulted in a bandgap greater than 2 eV. The insets in the graph show photographs of the films fabricated with and without A.E. element alloying.
