Figure 3.

PL spectra and PL peak energies. (a) The low-temperature PL spectra of the sample measured under different pumping powers from 3 mW to 30 mW; (b) The PL peak energies obtained under different excitation powers and the fitting curve of the peak energies with the third root of the excitation power.

Shuhui et al. Nanoscale Research Letters 2012 7:87   doi:10.1186/1556-276X-7-87
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