27 research outputs found
Hierarchical CdS Nanowires Based Rigid and Flexible Photodetectors with Ultrahigh Sensitivity
Hierarchical CdS nanowires were synthesized
via a facile vapor transport method, which were used to fabricate
both rigid and flexible visible-light photodetectors. Studies found
that the rigid photodetectors on SiO<sub>2</sub>/Si substrate showed
ultrahigh photo-dark current ratio up to 1.96 × 10<sup>4</sup>, several orders of magnitude higher than previously reported CdS
nanostructures, as well as high specific detectivity (4.27 ×
10<sup>12</sup> Jones), fast response speed and excellent environmental
stability. Highly flexible photodetectors were also fabricated on
polyimide substrate, which exhibited comparable photoresponse performance
as the rigid one. In addition, the as-prepared flexible devices displayed
excellent mechanical flexibility, electrical stability and folding
endurance. The results indicate that the hierarchical CdS nanowires
may be good candidates for nanoscale optoelectronic devices such as
high-efficiency photoswitches and highly photosensitive detectors