Study on Raman spectra of zinc selenide nanopowders synthesized by hydrothermal method

Li, Huiling; Wang, Biben; Li, Lijun

doi:10.1016/j.jallcom.2010.06.201

Cited by 55 publications

(28 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the enhanced Raman scattering and enhanced exciton-LO-phonon coupling observed in the CdS ripple-like MBs (Zeng et al 2014 ) were ascribed to larger exciton polarizations caused by surface defects via the Fröhlich interaction. The enhanced Raman scattering observed for ZnSe nanoparticles was ascribed to an aggregation of the ZnSe particles, resulting in dipolar interactions and improvement of the Fröhlich interaction (Li et al 2010 ). Recently, a remarkable increase in the Raman sensitivity of optimized Si nanowire arrays was determined to result from surface multiple scattering, characterized by a large spatial extension (approximately fifty nm) (Bontempi et al 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Size- and morphology-dependent optical properties of ZnS:Al one-dimensional structures

et al. 2015

View full text Add to dashboard Cite

Typical morphology substrates can improve the efficiency of surface-enhanced Raman scattering; the need for SERS substrates of controlled morphology requires an extensive study. In this paper, one-dimensional ZnS:Al nanostructures with the width of approximately 300 nm and the length of tens um, and micro-scale structures with the width of several um and the length of tens um were synthesized via thermal evaporation on Au-coated silicon substrates and were used to study their size effects on Raman scattering and photoluminescent spectra. The photoluminescence spectra reveal the strongest green emission at a 5 at% Al source, which originates from the Al-dopant emission. The Raman spectra reveal that the size and morphology of the ZnS:Al nanowires greatly influences the Raman scattering, whereas the Al-dopant concentration has a lesser effect on the Raman scattering. The observed Raman scattering intensity of the saw-like ZnS:Al nanowires with the width of tens nm was eight times larger than that of the bulk sample. The enhanced Raman scattering can be regarded as multiple scattering and weak exciton—phonon coupling. The branched one-dimensional nanostructure can be used as an ideal substrate to enhance Raman scattering.

show abstract

Section: Introductionmentioning

confidence: 99%

Size- and morphology-dependent optical properties of ZnS:Al one-dimensional structures

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The peak of approximately 245 cm −1 was also reported to be CZTSe related in both experimental and theoretical studies [15][16][17]. The peak of approximately 251.5 cm −1 is close to the Raman modes of these possible secondary phases: 253 cm −1 of ZnSe [18][19][20], 251 cm −1 of Cu 2 SnSe 3 [10], and approximately 250 cm −1 of amorphous selenium (a-Se) [21]. It is possible that extra selenium is present in CZTSe films, since they are fabricated in a Se-rich condition.…”

Section: Resultsmentioning

confidence: 57%

Spatially Resolved Laser-Induced Modification Raman Spectroscopy for Probing the Microscopic Structural Variations in the Quaternary Alloy Cu2ZnSnSe4

Chen

Bernardi²,

Zhang

2017

Phys. Rev. Applied

View full text Add to dashboard Cite

While producing comparable efficiencies and showing similar properties when probed by conventional techniques, such as Raman spectroscopy, photoluminescence, and x-ray diffraction, two thin-film solar-cell materials with complex structures, such as quaternary compound Cu 2 ZnSnSe 4 (CZTSe), may, in fact, differ significantly in their microscopic structures. In this work, laser-induced-modification Raman spectroscopy coupled with high spatial resolution and high-temperature capability is demonstrated as an effective tool to reveal the existence of microscopic scale variations between nominally similar alloys and, thus, to obtain additional structure information beyond what the conventional characterization techniques can offer. Specifically, CZTSe films prepared by sputtering and coevaporation methods that exhibit similar Raman and XRD features are found to behave very differently under high laser power and high-temperature Raman probe because the difference in their microscopic structures leads to different structure modifications in response to the external stimuli, such as light illumination and temperature. They are also shown to undergo different degrees of plastic changes and have different thermal conductivities as revealed by spatially resolved Raman spectroscopy. This technique provides a convenient way to assess and compare materials and provides complementary information for other structural characterization techniques, such as TEM and XRD.

show abstract

“…[1][2][3][4][5][6][7]. Semiconductor hollow microspheres represent a special class of materials which possess unique properties derived from their special morphologies [1,2,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…The ZnSe hollow microspheres were successfully prepared through this method, using monodisperse ZnO nanospheres as a starting reactant and in situ template [1]. They were also fabricated by several groups, via the hydrothermal reaction process using precursors of Zn(AC) 2 ·2H 2 O, ZnCl 2 (N 2 H 4 ) 2 and Na 2 SeO 3 [2,3,6,21]. Liu et al presented a facile ionic liquid assisted complex-solvothermal method to synthesize ZnSe hollow microspheres, which were dispersible and possessed an average diameter of about 1.0 m [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photoluminescence of semiconductor ZnSe hollow microspheres by two-sourced evaporation

Wei

Chang

et al. 2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Study on Raman spectra of zinc selenide nanopowders synthesized by hydrothermal method

Cited by 55 publications

References 17 publications

Size- and morphology-dependent optical properties of ZnS:Al one-dimensional structures

Size- and morphology-dependent optical properties of ZnS:Al one-dimensional structures

Spatially Resolved Laser-Induced Modification Raman Spectroscopy for Probing the Microscopic Structural Variations in the Quaternary Alloy Cu2ZnSnSe4

Synthesis and photoluminescence of semiconductor ZnSe hollow microspheres by two-sourced evaporation

Contact Info

Product

Resources

About