Evaluation of dopant energy and Stokes shift in Cu-doped CdS quantum dots via spectro-electrochemical probing

Copper (Cu) doped II–VI semiconductor quantum dots (QDs) manifest high luminescent dopant emission with excellent tunability. The Cu-doped II–VI QDs have been well studied via optical spectroscopy; nevertheless, the electrochemical study on doped QDs where the signals are traced to discover the abso...

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Published inNew journal of chemistry Vol. 44; no. 32; pp. 13529 - 13533
Main Authors Yadav, Amar Nath, Singh, Ashwani Kumar, Chauhan, Deepika, Solanki, Pratima R., Kumar, Pramod, Singh, Kedar
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 28.08.2020
Subjects
Cadmium sulfide
Copper
Correlation analysis
Dopants
Electrons
Quantum dots
Spectrum analysis
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Summary:Copper (Cu) doped II–VI semiconductor quantum dots (QDs) manifest high luminescent dopant emission with excellent tunability. The Cu-doped II–VI QDs have been well studied via optical spectroscopy; nevertheless, the electrochemical study on doped QDs where the signals are traced to discover the absolute energies of dopant and band-edges of the host is rarely investigated. Herein, we have estimated these energies in 2 nm Cu-doped CdS QDs via cyclic voltammetry (CV). The CV graph of doped QDs revealed a specific intragap state where the redox potential is near to the Cu energy state. The observed results from the CV analysis were well correlated with optical spectra.
ISSN:1144-0546
1369-9261
DOI:10.1039/D0NJ03004J