Article

A GaAs Nanowire Array Solar Cell With 15.3% Efficiency at 1 Sun

Ingvar ÅbergSol Voltaics AB, Lund, SwedenGiuliano VescoviSol Voltaics AB, Lund, SwedenDamir AsoliSol Voltaics AB, Lund, SwedenUmear NaseemSol Voltaics AB, Lund, SwedenJames P. GilboySol Voltaics AB, Lund, SwedenChristian SundvallSol Voltaics AB, Lund, SwedenAndreas DahlgrenSol Voltaics AB, Lund, SwedenKrister SvenssonSol Voltaics AB, Lund, SwedenNicklas AnttuSol Voltaics AB, Lund, SwedenMikael BjörkSol Voltaics AB, Lund, SwedenLars SamuelsonSol Voltaics AB, Lund, Sweden

2015en

ABI

Abstract

A GaAs nanowire array solar cell with an independently verified solar energy conversion efficiency of 15.3% and open-circuit voltage of 0.906 V under AM1.5g solar illumination at 1-sun intensity has been fabricated. This is the highest published efficiency for nanowire array solar cells and is twice the prior record for GaAs nanowire array solar cells. The solar cell has been fabricated by substrate-based epitaxy but is structurally compatible with substrate-less aerotaxy fabrication, providing a path to high-volume manufacturing. The short-circuit current of 21.3 mA/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> was generated with axial p-n junction GaAs cores covering 13% of the surface area, which is a volume of GaAs equivalent to a 370-nm-thick planar layer.

Identifiers

DOI: 10.1109/jphotov.2015.2484967

Citations and references

Cited by 90 references

Metrics — AkademScholar