Preparing the way for doping wurtzite silicon nanowires while retaining the phase.
It is demonstrated that boron-doped nanowires have predominantly long-term stable wurtzite phase while the majority of phosphorus-doped ones present diamond phase. A simplified model based on the different solubility of boron and phosphorus in gold is proposed to explain their diverse effectiveness in retaining the wurtzite phase. The wurtzite nanowires present a direct transition at the Γ point at approximately 1.5 eV while the diamond ones have a predominant emission around 1.1 eV. The aforementioned results are intriguing for innovative solar cell devices.
IMEM-CNR Institute , University Campus, Viale Delle Scienze 37/A, I-43124 Parma, Italy.
Filippo
F
Fabbri
Enzo
E
Rotunno
Laura
L
Lazzarini
Daniela
D
Cavalcoli
Antonio
A
Castaldini
Naoki
N
Fukata
Keisuke
K
Sato
Giancarlo
G
Salviati
Anna
A
Cavallini
D001895:Boron / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D006801:Humans; D053770:Nanowires / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D012993:Solar Energy
D010758:Phosphorus; D006046:Gold; D001895:Boron; D012825:Silicon