Abstract
We report on a high responsivity at zero bias in infrared photodetectors based on InAlAs quantum dots due to the formation of an Al-rich wetting layer which acts as an electron barrier. This layer has a larger bandgap and results from the low segregation and low surface diffusion of the Al atoms that mostly remain inside the wetting layer. These photovoltaic infrared photodetectors could operate up to 80 K and presented a detectivity similar to the one of a conventional photoconductive photodetector based on InAs quantum dots, despite the lack of optimization for photovoltaic operation. Such InAlAs devices might be good candidates for focal plane arrays that require low dark current, low noise, and low current consumption.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
