Diamond/graphene (carbon sp3-sp2) heterojunctions for neuromorphic device applications

Diamond/graphene (carbon sp 3 -sp 2 ) interfaces exhibit various interesting and potentially useful electronic phenomena. The present work demonstrates the possibility of obtaining novel neuromorphic photodevices using such junctions. Junctions were found to show different photoconductivity relaxati...

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Bibliographic Details
Published in:Journal of materials research 2024-08, Vol.39 (15), p.2107-2114
Main Authors: Iwane, H., Saito, G., Muto, S., Ueda, K.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Carbon
Chemistry and Materials Science
Diamonds
Graphene
Graphical user interface
Heterojunctions
Image processing
Inorganic Chemistry
Invited Feature Paper
Materials Engineering
Materials Science
Memory devices
Nanotechnology
Neuromorphic computing
Optoelectronic devices
Photoconductivity
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Summary:Diamond/graphene (carbon sp 3 -sp 2 ) interfaces exhibit various interesting and potentially useful electronic phenomena. The present work demonstrates the possibility of obtaining novel neuromorphic photodevices using such junctions. Junctions were found to show different photoconductivity relaxation behavior depending on their growth conditions such that various optoelectronic properties were observed. In particular, interfaces exhibiting shorter relaxation times could be used to construct image recognition devices mimicking short-term memory functions of the human brain. Using these devices, images of the hand-written numerals 0 through 9 could be optoelectronically recognized with an accuracy on the order of 80%, demonstrating both photo-detection and processing functions in a single device. These results suggest that novel image processing devices could be produced using graphene/diamond heterojunctions. Graphical Abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-024-01395-5