Characterization of Wurtzite Type ZnS Grown by RF Magnetron Sputtering

Dı́az-Reyes, J.; Castillo-Ojeda, Roberto Saúl; Martínez-Juárez, J.

doi:10.1007/978-3-319-15204-2_19

Cited by 1 publication

(3 citation statements)

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“…Hence, from the obtained spectra it can be confirmed that cubic-and hexagonal-structured ZnS compounds are formed and this observation is consistent with the XRD and SAED results. The shift in the band position towards the higher wavenumber compared to the bulk value is known to occur due to spatial confinement and tensile stress due to the presence of defects in the nanocrystalline system [26,35]. Moreover, the broadened peaks further confirm that the size of the particles formed is in nanometer regime.…”

Section: Raman Studiesmentioning

confidence: 80%

“…E 2 is nonpolar and Raman active modes, which can have only two frequencies, the higher frequency E 2 (high) and lower-frequency E 2 (low). The former is associated with sulfur atom, while the latter is associated with the vibration of the heavy Zn sublattice [35]. Finally, B 1 is both Raman and IR inactive; hence it is called an optically silent mode.…”

Section: Raman Studiesmentioning

confidence: 99%

“…This observation indicated that the lowtemperature synthesized w-ZnS nanoparticles are highly crystalline. Since the relative intensity of the LO band is a measure of the concentration of crystalline defects in the system, the prepared w-ZnS nanoparticles are crystalline rather than the c-ZnS nanoparticles [35].…”

Section: Raman Studiesmentioning

confidence: 99%

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Phase-dependent structural, optical, phonon and UV sensing properties of ZnS nanoparticles

Prasad

Karthikeyan

2019

Nanotechnology

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In order to investigate the influence of crystal structure on the photoresponse properties of ZnS nanoparticles under UV light exposure, electrical measurements on polyvinylpyrrolidone capepd cubic and hexagonal ZnS nanoparticles with average particle size 30-40 nm have been successfully carried out. Low-temperature solvothermal synthesis yields pure and highly crystalline w-ZnS nanoparticles with good stability. Different structures of prepared ZnS nanoparticles have been identified and confirmed with powder x-ray diffraction, high-resolution field-emission transmission electron microscopy and non-resonant Raman spectroscopic techniques, respectively. The energy band gap and emission properties of cubic and hexagonal ZnS have been studied using UV-vis absorption and photoluminescence spectroscopy. The interaction of phonons with free carriers and transport properties has a vital influence on the electronic and optical properties of nanomaterials. Hence, the resonant and non-resonant Raman spectral studies have been carried out for the prepared samples. Studies on the I-V characteristics and the mechanism behind the enhancement of photocurrent for the cubic and hexagonal ZnS nanoparticle-based photodetectors have shown an enhanced photocurrent for hexagonal ZnS nanoparticles rather than the cubic.

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Section: Raman Studiesmentioning

confidence: 80%

Section: Raman Studiesmentioning

confidence: 99%