Figure 3
From: Effects of rapid thermal annealing on the optical properties of strain-free quantum ring solar cells
PL spectra of solar cells and PL peak energy and integrated PL intensity. (a) PL spectra of the solar cell samples annealed with different temperatures. The laser excitation power is IL = 0.3 W/cm2. (b) PL spectra of the solar cells annealed with different temperatures. The laser excitation power is IH = 3,000 W/cm2. (c) PL peak energy and integrated PL intensity as a function of annealing temperatures under low excitation power IL. The inset is the PL line width as a function of annealing temperatures. (d) PL peak energy and integrated PL intensity as a function of annealing temperatures under high excitation power IH. The data obtained from the as-grown material is plotted at 650°C.