Investigation on Structural and Optical Properties of Willemite Doped Mn²⁺ Based Glass-Ceramics Prepared by Conventional Solid-State Method

Table 4

Band gap energy for undoped and Mn-doped Zn₂SiO₄ sintered at 600°C.

Percentage of MnO (wt.%)	Energy of gap (eV)
Undoped	3.96
1 wt.%	3.73
2 wt.%	3.19
3 wt.%	2.99
10 wt.%	2.58