Figure 3
(a). PL spectrum measured over the temperature range from 77 K to 300 K of a monolayer MoS2 after being annealed to 500°C. (b). The PL at 77 K with different excitation laser power. Both a and b were taken in the presence of N2 gas (50 Torr). (c). Integrated PL intensity of bound exciton (XB) and free exciton (X0) as a function of excitation laser power.
