GaAsP self-assisted core–shell -- nanowires were grown on Si solar cells. The resulting tandem cell exhibited an enhanced of 1.16 V, increasing from 0.54 V for the Si cell alone. Nevertheless, the efficiency of the tandem cell was only 3.51% as compared with 9.33% for the Si cell due to a current-limiting short-circuit current density from the nanowires. Further improvement in device performance can be realized by improving the nanowire open-circuit voltage and short-circuit current, related to doping of the nanowires.
Brendan A. Wood,
Ray R. LaPierre,
"GaAsP nanowire-on-Si tandem solar cell," Journal of Photonics for Energy 7(4), 042502 (5 December 2017). https://doi.org/10.1117/1.JPE.7.042502
. Submission: Received: 2 October 2017; Accepted: 16 November 2017
Received: 2 October 2017; Accepted: 16 November 2017; Published: 5 December 2017