Phonon confinement and substitutional disorder in Cd1−xZnxS nanocrystals

Sahoo, Satyaprakash; Dhara, Sandip; Sivasubramanian, V.; Kalavathi, S.; Arora, Akhi̇lesh

doi:10.1002/jrs.2232

Cited by 41 publications

(28 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that the calculated Raman lineshape does not match well with the data. Similar results have been reported in other nanocrystals and the disagreement between the calculated Raman lineshape and the data has been explained on the basis of defects [23,24]. Along with phonon confinement, defects also cause broadening in the Raman spectra.…”

Section: Resultssupporting

confidence: 86%

Studies of photovoltaic properties of nanocrystalline thin films of CdS–CdTe

Katiyar

Sahoo

Gaur

et al. 2011

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 86%

Studies of photovoltaic properties of nanocrystalline thin films of CdS–CdTe

Katiyar

Sahoo

Gaur

et al. 2011

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…14 The broadening Raman lineshape of c-LiGaO 2 may be due to the caion-anion bond length fluctuation. 25 In Li (1Àx)/2 Ga (1Àx)/2 Mg x O, with increasing the Mg content x, besides an asymmetric broad Raman peak at ca. 600 cm À1 , another disorder-activated mode at ca.…”

Section: Resultsmentioning

confidence: 97%

Disorder-activated Raman spectra of cubic rocksalt-type Li(1−x)/2Ga(1−x)/2MxO (M = Mg, Zn) alloys

Ohfuji

Irifune

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

Cation order-disorder phase transitions in LiGaO 2 : Observation of the pathways of ternary wurtzite under high pressure Disorder-activated phonon behaviors of the cubic rocksalt-type semiconductor alloy Li (1Àx)/2 Ga (1Àx)/2 M x O (M ¼ Mg, Zn) prepared by high-pressure and high-temperature method has been studied by Raman scattering analysis. The LO Raman phonon in Li (1Àx)/2 Ga (1Àx)/2 M x O was found to exhibit a distinct two-mode behavior. The compositional dependence of Raman frequency, peakwidth, and intensity has been discussed. A model associated with a composite mode of the Brillouin zone center and edge phonons combined with phonon dispersion curves determined by first-principle calculations were employed to explain the asymmetric broadening of the LO phonon mode. The broadening and asymmetric Raman line-shape in Li (1Àx)/2 Ga (1Àx)/2 M x O can be interpreted as a composite mode of the softening Brillouin zone center mode and the Brillouin zone edge mode. V C 2012 American Institute of Physics. [http://dx.

show abstract

“…These peaks are shifted towards higher Raman shift side in comparison to the 1-LO phonon peak of CdS (∼297 cm −1 ) [28][29][30]. A prominent 1-LO phonon mode and a 2-LO second harmonic phonon mode of comparatively less intensity were found for all the compositions and at all temperatures except for the sample with x = 0.8.…”

Section: Raman Spectroscopy Analysismentioning

confidence: 82%

Annealing-induced effects on structural and optical properties of Cd1−xZnxS thin films for optoelectronic applications

Zakria

Khan

Nasir

et al. 2015

Materials Science-Poland

View full text Add to dashboard Cite

Cd 1−x Zn x S thin films of variable compositions (x = 0.2, 0.4, 0.6, 0.8) were deposited on glass at room temperature by thermal evaporation process. The prepared samples were annealed at two different temperatures (300°C, 400°C) for 1 hour in ambient air. The effects of post-annealing on the structural and optical characteristics were investigated using X-ray diffraction (XRD), spectrophotometry, and Raman spectroscopy (RS) methods. XRD studies suggested that the annealed and as-deposited samples belong to wurtzite structure for all Zn concentrations with a preferential orientation along (002) plane. Spectrophotometry analysis of the samples revealed that the energy band gap decreased with annealing temperature. RS investigated different phonon bands and crystalline phases. Two longitudinal optical phonon modes (1-LO, 2-LO) corresponding to monophase hexagonal structure were observed for all Cd 1−x Zn x S samples. The observed red-shift and anti-symmetrical nature of the 1-LO phonon mode can be associated with annealing, while the overall blue-shift, except for x 0.6, was caused by the structural disorders in periodic Cd atomic sub-lattices and broken translational symmetry. The spectroscopic results were strengthened by the XRD studies and their results are consistent.

show abstract

Phonon confinement and substitutional disorder in Cd_1−xZn_xS nanocrystals

Cited by 41 publications

References 22 publications

Studies of photovoltaic properties of nanocrystalline thin films of CdS–CdTe

Studies of photovoltaic properties of nanocrystalline thin films of CdS–CdTe

Disorder-activated Raman spectra of cubic rocksalt-type Li(1−x)/2Ga(1−x)/2MxO (M = Mg, Zn) alloys

Annealing-induced effects on structural and optical properties of Cd1−xZnxS thin films for optoelectronic applications

Contact Info

Product

Resources

About