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Title: Adamantylidene Addition to M 3 N@ Ih -C 80 (M=Sc, Lu) and Sc 3 N@ D 5h -C 80 : Synthesis and Crystallographic Characterization of the [5,6]-Open and [6,6]-Open Adducts
Authors:
 ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  
Publication Date:
NSF-PAR ID:
10026482
Journal Name:
Chemistry - A European Journal
Volume:
23
Issue:
27
Page Range or eLocation-ID:
6552 to 6561
ISSN:
0947-6539
Publisher:
Wiley Blackwell (John Wiley & Sons)
Sponsoring Org:
National Science Foundation
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  1. Light induced charge separation in a newly synthesized triphenylamine–thiophene-Sc 3 N@ I h -C 80 donor–acceptor conjugate and its C 60 analog, triphenylamine–thiophene-C 60 conjugate is reported, and the significance of the thiophene spacer in promoting electron transfer events is unraveled.
  2. High-performance hybrid graphene photodetectors were prepared with endohedral fullerenes deposited on graphene using electrophoretic methods for the first time. Endohedral Sc 3 N@C 80 , which acts as an electron acceptor, was used and the ensuing electronic and optoelectronic properties were measured. Another endohedral fullerene, La@C 82 , was also adsorbed on graphene, which acts as an electron donor. Upon optical illumination, for the Sc 3 N@C 80 –graphene hybrid, the photoinduced free holes are injected into graphene, increasing the hole carrier concentration in graphene, while the photoexcited electrons remain in Sc 3 N@C 80 ; this leads to amore »high photoresponsivity  of ∼10 9 A W −1 , detectivity D of ∼10 15 Jones, and external quantum efficiency EQE ∼ 10 9 % for the Sc 3 N@C 80 –graphene hybrid. This  is ∼10 times higher compared to other reports of quantum dot-graphene and few layer MoS 2 –graphene heterostructures. Similarly, for the La@C 82 –graphene hybrid,  ∼ 10 8 A W −1 , D ∼ 10 14 Jones, and EQE ∼ 10 6 % were achieved, with electrons being injected into graphene. The exceptional performance gains achieved with both types of hybrid structures confirms the potential of endohedrals to dope graphene for high performance optoelectronic devices using a facile and scalable fabrication process.« less