Figure 2: Dual junction limiting efficiencies.
From: Efficiency limits for photoelectrochemical water-splitting
Limiting efficiencies (ηPEC) versus semiconductor bandgaps (Eg) for (a) ideal case (ηmax=40.0%, Eg=1.40, 0.52 eV), (b) high-performance realistic case (ηmax=28.3%, Eg=1.59, 0.92 eV) and (c) Earth abundant realistic case (ηmax=16.2%, Eg=1.93, 1.38 eV), where contour lines mark every 5% and maximum efficiency points are indicated; a constant colour scale is used for a–c; parameter values used for each case are tabulated in Table 1.
