Fig. 5From: Investigations on the Optical Properties of InGaN/GaN Multiple Quantum Wells with Varying GaN Cap Layer ThicknessThe red lines in (a), (b), and (c) are fitting curves based on Eq. (1) and the fitting parameter σ is 36.96 meV, 18.89 meV, and 23.77 meV for samples A, B, and C, respectively. (d) Shows the experimental data of PL peak energy as a function of temperatureBack to article page