Figure 8
From: Enhanced Conversion Efficiency of III–V Triple-junction Solar Cells with Graphene Quantum Dots

(a) External quantum efficiency (EQE) spectra of the InGaP/InGaAs/Ge triple-junction solar cell with (solid line) and without (dashed line) the introduction of GQDs with a concentration of 1.2 mg/ml. (b) EQE enhancement ratio of the InGaP/InGaAs/Ge triple-junction solar cell after the introduction of GQDs.