Optical Characterization of Zinc Modified Bismuth Silicate Glasses

Table 2

Values of band gap (), excitonic binding energy (), linewidths for state (), linewidth of continuum (), and absorption strength () obtained from best fit to absorption spectrum using hydrogenic excitonic expression for 40SiZn)Bi₂O₃ glass system.

Compositions ()	(eV)	(meV)	(meV)	(meV)	(eV^1/2/cm)
0	2.81	3.00	25	137	450
5	2.88	3.01	25	55	942
10	2.90	3.00	25	125	931
15	2.91	3.15	25	54	877
20	2.93	3.06	25	77	981
25	2.94	3.07	25	54	858
30	2.96	4.78	25	72	600
35	3.00	3.40	25	56	822