Figure 4
From: Enhanced photovoltaics inspired by the fovea centralis
3D electrical simulations comparing the performance of a single LF with a single NW in their respective arrays under Air Mass 1.5 illumination.
(a), Left. The electrostatic potentials inside a NW and a LF for 1020 cm−3 emitter (phosphorus) and 1016 cm−3 p-type base. Right. Normalized SRH recombination. (b), Voc and Isc vs. base doping for NW and LF solar cells. The main advantage of LF over NW is the increased Isc which is a consequence of the enhanced LF absorption. (c), Current vs. voltage of NW and LF for base doping of 1018 cm−3. The 3D NW and LF images presents the superior carrier generation in LF. (d), Voc and Isc of LF and NW vs. surface recombination velocity. Both structures are relatively insensitive to SRV in the range of 0–103 cm/s. However for SRV > 103 cm/s a sharper decrease in LF performance is recorded. This decrease is attributed to S/V effects.
