Journal of Nanomaterials / 2013 / Article / Fig 8

Research Article

Effect of Erbium Nanoparticles on Optical Properties of Zinc Borotellurite Glass System

Figure 8

Optical band gap energy ( ) and Urbach energy . (a) Variation of indirect optical band gap with glass composition for indirect transition for erbium nanoparticles doped glass samples. (b) Variation of direct optical band gap with glass composition for direct transition erbium nanoparticles doped glass samples.
940917.fig.008a
(a)
940917.fig.008b
(b)

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