1. Optical properties and bridge photodetector integration of lead sulfide nanowires
- Author
-
Dong Yu, Ju Hee Im, Yiming Yang, Rui Xiao, Eunsoon Oh, Sean Ritter, Jungdong Kim, Won Jun Choi, Jae-Gwan Park, and Sang Hyuk Kim
- Subjects
Photoluminescence ,Materials science ,Exciton ,Nanowire ,Photodetector ,Bioengineering ,02 engineering and technology ,Chemical vapor deposition ,010402 general chemistry ,01 natural sciences ,chemistry.chemical_compound ,General Materials Science ,Lead sulfide ,Electrical and Electronic Engineering ,Photocurrent ,Potential well ,business.industry ,Mechanical Engineering ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Mechanics of Materials ,Optoelectronics ,0210 nano-technology ,business - Abstract
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 (∼70 nm) being significantly larger than the exciton Bohr radius (∼18 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 ∼3 μm at room temperature.
- Published
- 2017