Figure 5.

Emission spectra of ZnO QDs with different concentrations of Cd. (A) 318-nm and (B) 365-nm excitation. (a) 0.0%, (b) 2.0%, (c) 5.0%, (d) 10.0%, (e) 20.0%.

Zhang et al. Nanoscale Research Letters 2012 7:405   doi:10.1186/1556-276X-7-405
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