Figure 12. Urbach plot of versus photon energy for pure PVA and PVA/HgS nanocomposites films.

From

In-situ Synthesis of PVA/HgS Nanocomposite Films and Tuning Optical Properties

Omed Gh. Abdullah, Yahya A.K. Salman, Salwan A. Saleem

Physics and Materials Chemistry. 2015, 3(2), 18-24 doi:10.12691/pmc-3-2-1