Photoconductive thin films with pbse nanostructures
AssigneeIllinois Tool Works Inc.
InventorsRichard S. Kim, Jeung Hun Park
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Abstract
Methods and systems are provided for a homogenous, single crystal, electrically conductive, and narrow bandgap PbSe nanostructure is synthesized using a chemical bath deposition on, for example, quartz substrates, and includes a tunable iodine doping process to select the size and/or shape of the nanostructures. The single crystalline PbSe nanostructure can be exposed following an isolation process (e.g., etching process), and the concentration and/or distribution of iodine across multiple PbSe nanostructures (e.g., on a quartz substrate) can be adjusted during post processing steps, including heat treatments.
Claims20
A photoconductive thin film, comprising:
- a substrate;
- and
- a plurality of single crystalline lead selenide (PbSe) nanoparticles arranged on the substrate, the nanoparticles containing a threshold amount of iodine dopant.
A photoconductive thin film, comprising:
- a substrate;
- and
- a layer of single crystalline lead selenide (PbSe) nanostructures comprising iodine arranged on the substrate, the layer defined by a narrow bandgap allowing optical absorption in the low- and mid-infrared (IR) spectrum.
A photodetector comprising:
- a substrate;
- and
- a photoconductive thin film, the photoconductive thin film comprising a plurality of single crystalline lead selenide (PbSe) nanoparticles arranged on the substrate, the nanoparticles containing a threshold amount of iodine dopant.
Dependencies are inferred from the claim text.