Full text loading...
MPL spectra of M1 (a) and M2 (b) under 20 mW at 4 and 11 K, respectively. The dotted lines are the curve-fitting results. The solid line is used to guide the eyes.
Normalized MPL spectra of M1 (a) of different excitation powers at 4 K and (b) at different temperatures under 20 mW. The parts of low energy side have been amplified by 2 for clarity. The dotted lines are used to roughly illustrate the evolution of peaks. The downward arrow in (b) represents the absorption of .
Temperature dependence of the peak energy from Fig. 2(b). The data of peaks and are upshifted by 35 meV. The solid line represents the calculated result of CXT formula.
Sample composition, doping, annealing, carrier density, and mobility at 77 K. “” represents -type.
Article metrics loading...