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Photoinduced conductivity enhancement in quantum dot/multilayer graphene nanostructures

Published online by Cambridge University Press:  30 June 2015

Yulia A. Gromova ,
Ivan A. Reznik ,
Ilia A. Vovk ,
Simas Rackauskas ,
Andrei V. Alaferdov ,
Anna A. Orlova ,
Stanislav A. Moshkalev ,
Alexander V. Baranov  and
Anatoly V. Fedorov
Yulia A. Gromova
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
Ivan A. Reznik
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
Ilia A. Vovk
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
Simas Rackauskas
Affiliation:
CCS UNICAMP, 13083-870, Campinas, Brazil;
Andrei V. Alaferdov
Affiliation:
CCS UNICAMP, 13083-870, Campinas, Brazil; Lobachevsky State University of Nizhni Novgorod, Gagarine Av. 23/3, Nizhni Novgorod, Russia
Anna A. Orlova
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
Stanislav A. Moshkalev
Affiliation:
CCS UNICAMP, 13083-870, Campinas, Brazil;
Alexander V. Baranov
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
Anatoly V. Fedorov
Affiliation:
ITMO University, Kronverkskiy 49, Saint Petersburg, Russia;
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Abstract

We report on the formation of photoactive hybrid structures based on multilayer graphene nanobelts and CdSe/ZnS quantum dots (QDs) on Pt microelectrodes. We have found that heat treatment in mild conditions enhances rate of electrical photoresponse of the hybrid structures due to elimination of long-lived charge traps. We also show that the electrical photoresponse polarity depends on the energy level structure of the QDs.

Keywords

optical propertiesphotoconductivitynanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1787: Symposium U – The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials , 2015 , pp. 15 - 19
Copyright
Copyright © Materials Research Society 2015 

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References

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