1.
Nanotechnology
; 28(47): 475706, 2017 Nov 24.
Artículo
en Inglés
| MEDLINE
| ID: mdl-28956532
RESUMEN
We studied optical properties and photocurrent characteristics of PbS nanowires grown by chemical vapor deposition. Distinct bandedge photoluminescence (PL) emission was observed in the mid-infrared spectral range and the quantum confinement effect estimated from the PL peak energy was within 40 meV, consistent with the average diameter of the nanowire (â¼70 nm) being significantly larger than the exciton Bohr radius (â¼18 nm). We also demonstrated interdigit photo detectors making use of these PbS nanowires suspended between two pre-patterned Ti electrodes, where Ti also acted as metal catalyst for the nanowire growth. The threshold wavelength of the photocurrent was found to be â¼3 µm at room temperature.