Spectroscopic studies on Fe3+ doped CdS nanopowders prepared by simple coprecipitation method

Sekhar, Halubai; Rao, D. Narayana

doi:10.1016/j.jallcom.2011.12.039

Cited by 37 publications

(12 citation statements)

References 31 publications

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“…This resulted in an increase in the phonon frequency. Similar kind of red shift in Raman peaks was also observed in CdS:Fe and CdS:Zn nanocrystals prepared by different methods [47,48]. In addition, it is interesting to note that the phonon mode at 280 cm À1 which was brought by Mn doping was prominent for Mn (3%) doped CdS samples.…”

Section: Resultssupporting

confidence: 73%

Room temperature ferromagnetism in Mn doped CdS nanowires

Murali

Reddy

Giribabu

et al. 2013

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 73%

Room temperature ferromagnetism in Mn doped CdS nanowires

Murali

Reddy

Giribabu

et al. 2013

Journal of Alloys and Compounds

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“…No appreciable changes have been observed for other peaks after doping of Co. This confirms the coordination and conjunction of the intrabonds present in Co-doped CdS quantum dots. − All the assigned peaks are shown in Table .…”

Section: Resultssupporting

confidence: 61%

Role of Cobalt Doping in CdS Quantum Dots for Potential Application in Thin Film Optoelectronic Devices

Maity

Kumar

et al. 2021

J. Phys. Chem. C

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Colloidal quantum dots (QDs) are promising materials for optoelectronic devices. In this paper, monodispersed and environment stable cobalt (Co)-doped CdS QDs have been synthesized and characterized for potential application in thin film optoelectronic devices. The Rietveld refinement profiles of X-ray diffraction data reveal that both undoped and Co-doped CdS QDs exhibit a zinc blende structure without any impurity phase. X-ray photoemission spectroscopy has been used for electronic structure and valence state analysis. The detailed information about the doping, coordination number, and local geometry has been studied with XANES and EXAFS measurements. Analysis of Raman spectra reveals that the intensity of longitudinal optical (LO) modes varies considerably due to short-range structural disorder. Absorption spectra also show the creation of a new doping band (DB) near the NIR region in Co-doped CdS QDs which is not observed for doping of many other transition metals. The width of this DB increases with an increase in the doping concentration, and enhancement of photoconductivity of the thin film heterojunction of the samples has been obtained. Evolution of the new DB and enhancement of the photocurrent upon Co doping make the prepared quantum dots very promising materials to exploit for fabricating UV–vis/NIR thin film optoelectronic devices.

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“…Non-metal dopants (e.g., C [224] , [225] , B [226] , [227] , [228] , [229] , P [57] , [230] , S [231] , [232] , N [233] , [234] , [235] , [236] , and halogen [237] , [238] ) and metallic dopants (e.g. Fe 3+ [239] , [240] , Ce 3+ [62] , Cr 3+ [241] , W 6+ [242] , Ti 4+ [243] , Cu 2+ [241] , Co 2+ [244] , [245] and Er 3+ [246] ) were most widely studied in semiconductor photocatalysts, especially metal oxides. Generally, a method can either introduce an impurity energy level lower than the CB minimum or higher than the VB maximum to narrow down the bandgap, enhancing light absorption.…”

Section: Strategies For Photocatalytic Activity Improvementmentioning

confidence: 99%