Erratum to “InGaN Quantum Dot Superlattices as Ratchet Band Solar Cells” [Mar 22 474-482]

After publication of the original article [4], we found a unit-conversion error in the calculations of absorption cross sections. None of the equations in the original article are incorrect, but our numerical implementation of the dipole matrix elements of (2) made their calculated values too large by a factor of 25.6. The absorption cross sections $\sigma$ depend on the matrix element squared, so they are all overstated by a factor of 656. The corrected Fig. 4 is changed only in the vertical-axis labels.