Catchpole, KylieMokkapati, S.Beck, Fiona2015-09-172015-09-170021-8979http://hdl.handle.net/1885/15522In this paper we quantify the constraints and opportunities for radial junctionnanowiresolar cells, compared to single junction and multijunction solar cells, when light trapping is included. Both nanowire and multijunction designs are reliant on a very low level of traps in the junction region, and without this, single junction designs are optimal. If low trap density at the junction can be achieved, multijunction cells lead to higher efficiencies than nanowire cells for a given diffusion length, except in the case of submicron diffusion lengths. Thus the radial junctionstructure is not in itself an advantage in general, though if nanowires allow faster deposition or better light trapping than other structures they could still prove advantageous.This work was supported by the Australian Research Council.6 pagesCopyright 2011 American Institute of Physics.Keywords: Diffusion length; Higher efficiency; Junction structure; Light-trapping; Low level; Multi junction solar cells; Multi-junction cells; Multijunction; Single junction; Single junction solar cells; Submicron; Trap density; Solar cells; Nanowires2011-04-2610.1063/1.35794202016-02-24