Abstract
An intermediate band solar cell which generates photocurrent due to sequential absorption of two sub‐bandgap photons at temperatures up to 300 K was realized. The intermediate band is comprised of a “quantum ratchet” semiconductor nanostructure which is designed to store the photoelectron in a long‐lived state that allows for efficient optical re‐absorption; it incorporates a potential barrier designed to both increase the confinement of electrons and reduce thermal escape. This leads to extended electron lifetimes in the ratchet state and room temperature operation. At low temperature (≈12 K), electrons exhibit a ratchet state lifetime of τRB > 100 s, representing an increase by a factor of ≈107 over a device without the barrier.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.