OPTICAL PROPERTIES OF PBS-GO AND PBS-RGO SYSTEM FOR SOLAR CELLS FABRICATION

1 Babaev Anton
Co-authors:
1 Dubavik Aliaksei 1 Cherevkov Sergei 1 Parfenov Peter 1 Ushakova Elena 1 Baranov Mikhail 2 Nabiev Igor 1 Baranov Alexandr 1 Litvin Aleksandr
Institutions:
1 ITMO University, Saint-Petersburg, Russia, a.a.babaev@corp.ifmo.ru
2 Research Nuclear University MEPhI, Moscow, Russia
Conference:
10th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 17th - 19th 2018
Proceedings:
Proceedings 10th International Conference on Nanomaterials - Research & Application
Pages:
24-29
ISBN:
978-80-87294-89-5
ISSN:
2694-930X
Published:
28th February 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
6 views / 2 downloads
Abstract

Quantum dots (QDs) are of great interest for creating optoelectronic devices due to their tunable bandgap, high stability and simple solution processability for device fabrication. One of the ways to increase the efficiency of such devices is to combine QDs with different carbon nanostructures. Lead sulfide PbS QDs with a ligand shell of oleic acid (OA), methylammonium iodide (MAI) and PbI2 were employed to study the process of charge transfer process between QDs and sheets of reduced graphene oxide (rGO) and graphene oxide (GO). QDs have been linked to graphene sheets by the (3-mercaptopropyl) trimethoxysilane in colloidal solution. As a result, we observed a change in intensity and kinetics of QDs PL, that allowed to estimate the efficiency of the charge transfer. The transfer efficiency for the QD-rGO system was found to be higher than that of the QD-GO system, ~ 80% vs. 66% respectively. Modification of the QDs surface with MAI and PbI2 allowed to achieve a charge transfer efficiency of up to 83% and 89%, respectively.

Keywords: Colloidal quantum dots, reduced graphene oxide, graphene oxide, PbS
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