Activating graphene’s optoelectronic response through interactions with fullerene and metallofullerene clusters

Kishan Jayanand; Anupama B. Kaul

doi:10.1117/12.2578936

5 March 2021 Activating graphene’s optoelectronic response through interactions with fullerene and metallofullerene clusters

Kishan Jayanand, Anupama B. Kaul

Author Affiliations +

Proceedings Volume 11688, 2D Photonic Materials and Devices IV; 116880T (2021) https://doi.org/10.1117/12.2578936
Event: SPIE OPTO, 2021, Online Only

Abstract

High-performance hybrid graphene photodetectors were prepared with fullerenes and metallofullerenes deposited on graphene using electrophoretic deposition technique. Fullerene C₆₀ which acts as an electron acceptor, and metallofullerene Sc₃N@C₈₀ which act as an electron acceptor and electron donor respectively, were used to decorate the surface of the graphene. Raman spectroscopy analysis of C₆₀ film after electrophoretic deposition and annealing reveals no change in bonding or chemical composition. Both Raman area map and AFM topography scans reveal a continuous film like deposition of C₆₀ between electrodes during electrophoretic deposition. The charge transfer between graphene and fullerene/metallofullerene and consequent photocurrent generation contribute to a high photoresponsivity ℛ in our hybrid graphene detectors. The responsivity ℛ of the C₆₀ - graphene and Sc₃N@C₈₀ – graphene hybrids were measured to be ~ 10⁹ A/W, while the detectivity and external quantum efficiency were also exceptional, ~ 10¹⁵ Jones and ~ 10⁹ %, respectively. The exceptional performance gains achieved with graphene–0D hybrid structures confirm the potential of endohedrals and metallofullerenes to dope graphene for high performance optoelectronic devices using a facile and scalable fabrication process.

Conference Presentation

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Kishan Jayanand and Anupama B. Kaul "Activating graphene’s optoelectronic response through interactions with fullerene and metallofullerene clusters", Proc. SPIE 11688, 2D Photonic Materials and Devices IV, 116880T (5 March 2021); https://doi.org/10.1117/12.2578936

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