Figure 4.

Schematic band diagram of the DLE emissions in ZnO based on the full potential linear muffin-tin orbital method and the reported data as described in references [9-20,22]. Also oxygen vacancies situated 1.65 eV below the conduction band are denoted to be contributing to the red emission.

Alvi et al. Nanoscale Research Letters 2011 6:130   doi:10.1186/1556-276X-6-130
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