Efficient electron transfer in CdSe quantum dots-decorated reduced graphene oxide for electromagnetic interference shielding application

Effective charge separation and use of hot charge carriers are considered to be the most essential factors affecting the activity of an excellent energy harvester. Herein, we have successfully decorated 3 nm of CdSe quantum dots (QDs) on the surface of reduced graphene oxide (rGO) using solvothermal...

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Published inBulletin of materials science Vol. 47; no. 2; p. 119
Main Authors Yadav, Amar Nath, Upadhyay, Shiva, Singh, Ashwani Kumar, Singh, Kedar
Format Journal Article
LanguageEnglish
Published Bangalore Indian Academy of Sciences 04.06.2024
Springer Nature B.V
Subjects
Cadmium selenides
Chemistry and Materials Science
Composite materials
Current carriers
Diffraction patterns
Electromagnetic interference
Electromagnetic shielding
Electron transfer
Electrons
Emission
Energy harvesting
Engineering
Excitons
Graphene
Graphite
Materials Science
Nanocomposites
Photovoltaic cells
Potassium
Quantum dots
Raman spectroscopy
Sulfuric acid
This article is part of the Special issue on “Materials for Energy and Sustainable Development”
Time correlation functions
carbon materials
nanocomposites (NCs)
Semiconductors
spectroscopy
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Summary:Effective charge separation and use of hot charge carriers are considered to be the most essential factors affecting the activity of an excellent energy harvester. Herein, we have successfully decorated 3 nm of CdSe quantum dots (QDs) on the surface of reduced graphene oxide (rGO) using solvothermal method. Formation of CdSe–rGO nanocomposite (NC) has been confirmed by X-ray diffraction pattern, transmission electron microscopy and Raman analysis. Further, the emission spectrum of CdSe–rGO NC shows quenching of emission of CdSe QDs on the surface of rGO nanosheet. To elucidate this phenomenon, we have carried out time-correlated single-photon counting (TCSPC) measurements, which reveal efficient electron transfer, as the exciton lifetime of CdSe QDs in the NC is significantly reduced compared to bare CdSe QDs. Owing to the efficient electron transfer, this NC showed big boost in total shielding effectiveness ( SE T = 29 dB) when compared to graphene ( SE T = 23 dB) in electromagnetic interference shielding application. Graphical abstract
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-024-03240-1