Research Letter

Effect of Ge Addition on the Optical Band Gap and Refractive Index of Thermally Evaporated A s 2 S e 3 Thin Films

Table 1

Values of thickness (d), n, k, and Egopt for As2Se3 and (As2Se3)90Ge10 thin films.

Compositiond (nm)at 800 nmEgopt (eV)
nk

As2Se39342.500.00541.52
(As2Se3)90Ge109002.640.00761.46