Role of growth parameters on structural and optical properties of ZnS nanocluster thin films grown by solution growth technique

Lee, Jongwon; Lee, Sangwook; Cho, Sungryoung; Kim, Seontai; Park, In Yong; Choi, Yong Dae

doi:10.1016/s0254-0584(01)00563-6

Cited by 62 publications

(16 citation statements)

References 21 publications

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“…The emission peaks are blue-shifted in relation to the band gap and may be attributed to band emissions from different small nanocrystalline domains or clusters and also to partial exchange between Zn and cations from CuInS 2 (predominantly) with in [44]. The peak observed at 417 nm is in accordance with the weak one observed for ZnS published by Lee et al in paper [45]. The peak at 517 and 594 nm may be attributed to CuInS 2 /ZnS in accordance with the PL spectra observed for CuInS 2 /ZnS QDs in paper [46].…”

Section: Resultssupporting

confidence: 85%

Mechanochemical Synthesis and Characterization of CuInS2/ZnS Nanocrystals

et al. 2019

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In this study, CuInS2/ZnS nanocrystals were synthesized by a two-step mechanochemical synthesis for the first time. In the first step, tetragonal CuInS2 was prepared from copper, indium and sulphur precursors. The obtained CuInS2 was further co-milled with zinc acetate dihydrate and sodium sulphide nonahydrate as precursors for cubic ZnS. Structural characterization of the CuInS2/ZnS nanocrystals was performed by X-ray diffraction analysis, Raman spectroscopy and transmission electron microscopy. Specific surface area of the product (86 m2/g) was measured by low-temperature nitrogen adsorption method and zeta potential of the particles dispersed in water was calculated from measurements of their electrophoretic mobility. Optical properties of the nanocrystals were determined using photoluminescence emission spectroscopy.

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Section: Resultssupporting

confidence: 85%

Mechanochemical Synthesis and Characterization of CuInS2/ZnS Nanocrystals

et al. 2019

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“…The deviation in the bandgap resulting from the fine grain structure of the films can be understood by quantum size effect . The quantum size effect predicts a linear relationship between the observed bandgap and inverse‐square of the crystallite size (D) as shown below:

E_{g}^{observed} = normalM + \frac{N}{{normalD}^{2}}

where M and N are constants whose values are obtained from the plot of

E_{g}^{observed}

\frac{1}{{normalD}^{2}}

. In the present case, the values of M and N were found to be 3.45 eV and 2 eV nm 2 , respectively (Figure ).…”

Section: Optical Propertiessupporting

confidence: 52%

Analysis of microstructural properties, energy band structure, and defect levels of ZnS films obtained from micro‐controlled SILAR method

Ashith

Rao

2018

Surface & Interface Analysis

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Zinc sulphide (ZnS) thin films were deposited on glass substrate by micro-controllerbased successive ion layer adsorption and reaction method using ZnCl 2 as a precursor.The films were found to be polycrystalline. The crystallite size of the films increased with the increase in both precursor concentration and immersion cycles. The increased crystallite size resulted in the reduction of grain boundary defects which, in turn, improved the electrical properties of the films. The energy band structure of the films was analysed using absorbance and photoluminescence spectra. The films displayed strong absorption for wavelengths less than 400 nm indicating the presence of a wide bandgap with shallow defect levels near the band edges. The bandgap of the films was estimated to be between 3.3 and 3.5 eV. The photoluminescence spectra of the films exhibited a prominent excitonic peak at around 3.33 eV. The defect level emissions were observed at around 3.1, 2.92, 2.76, and 2.64 eV. These emissions were attributed to the transitions from localized zinc and sulphur vacancy levels and interstitial states. An energy band diagram of the films was drawn based on the result of optical and photoluminescence studies.

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“…The cubic phase is stable at room temperature, while the hexagonal one is stable above 1020 1C [23]. Several groups [40][41][42] have reported the same result for ZnS films grown by chemical bath deposition. At pH ¼11 (Fig.…”

Section: Structural Propertiesmentioning

confidence: 57%