AI Article Synopsis
- Researchers have developed extremely sensitive photodetectors using all carbon-based materials, specifically graphite quantum dots and graphene.
- The photodetectors achieve an impressive photocurrent responsivity of up to 4 × 10(7) AW(-1) due to the effective separation of charge carriers and the right band alignment between the two materials.
- This work demonstrates the potential of combining various carbon nanostructures to create efficient, low-cost, and non-toxic optoelectronic devices, paving the way for their future development.
Article Abstract
Photodetectors with ultrahigh sensitivity based on the composite made with all carbon-based materials consisting of graphite quantum dots (QDs), and two dimensional graphene crystal have been demonstrated. Under light illumination, remarkably, a photocurrent responsivity up to 4 × 10(7) AW(-1) can be obtained. The underlying mechanism is attributed to the spatial separation of photogenerated electrons and holes due to the charge transfer caused by the appropriate band alignment across the interface between graphite QDs and graphene. Besides, the large absorptivity of graphite QDs and the excellent conductivity of the graphene sheet also play significant roles. Our result therefore demonstrates an outstanding illustration for the integration of the distinct properties of nanostructured carbon materials with different dimensionalities to achieve highly efficient devices. Together with the associated mechanism, it paves a valuable step for the further development of all carbon-based, cheap, and non-toxic optoelectronics devices with excellent performance.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3776196 | PMC |
| http://dx.doi.org/10.1038/srep02694 | DOI Listing |
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