This invention introduces carbon-biomaterial nanohybrids for use in high-performance, low-cost optoelectronic devices such as infrared detectors.
Low-cost uncooled photodetectors for use in thermal sensing devices.
The feasibility of this invention has been demonstrated by KU researchers using the Cytochrome complex (Cyt c) biomolecule. Solutions of Cyt c and SWCNTs were mixed to promote self-assembly of SWCNT/Cyt c hybrid building blocks (helical wrapping of Cyt c around each SWCNT). The resulting thin films provide a composite of well-dispersed heterojunctions. When light impinges onto the photodetector, excitons generate in the SWCNTs and rapidly diffuse to the heterojunction interface where the Cyt c accepts the electrons and conducts to the external electrode.
Near infrared (NIR) responsivity of this invention has been measured at levels more than two orders of magnitude better than SWCNT-polymer hybrids. This result suggests that SWCNT-biomolecule hybrids may lead to uncooled IR detectors with unprecedented performance.
CNT-based photodetectors show great potential to outperform conventional semiconductor-based photodetectors. This invention presents the best performance yet achieved using CNTs and thus presents a promising basis for future photodetector technology.
Photonics, optoelectronics, and other electronic devices.