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Journal of Nanostructures، جلد ۱۲، شماره ۲، صفحات ۳۳۰-۳۴۲
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عنوان انگلیسی Dopant-Concentration Dependent Optical and Structural Properties of Cu-Doped Zns Thin Films
چکیده انگلیسی مقاله In this paper, using the chemical bath deposition method and employing the suitable deposition temperature, internal doping of Cu2+ ions into nanocrystalline ZnS thin films is reported. X-ray diffraction analysis (XRD) was used to evaluate the structure of the films, which consists of sub-7 nm crystallites of the cubic ZnS. FE-SEM images indicated that the surface morphology of the Cu-doped ZnS films is strongly dependent on dopant level. The influence of the Cu2+ ions concentration on optical and specially photoluminescence properties of the Cu:ZnS thin films have been investigated and discussed. Defect-free emission spectra at low deposition temperatures and the appearance of the dopant-related emission peak at higher temperatures demonstrate that this method is an effective strategy for chemical deposition of the Cu-doped ZnS nanocrystals on glass substrates. Furthermore, the concentration quenching effect on photoluminescence intensity has been observed which can be related to non-radiative transitions between electronic energy levels of the neighboring Cu2+ ions in the ZnS host lattice.
کلیدواژه‌های انگلیسی مقاله Cu-doped ZnS thin films, Dopant emission, nanocrystals, Photoluminescence
نویسندگان مقاله Fatemeh Aghaei |
Department of Chemistry, Ilam University, Ilam, Iran

Reza Sahraei |
Department of Chemistry, Ilam University, Ilam, Iran

Ehsan Soheyli |
Department of Physics, Ilam University, Ilam, Iran

Ali Daneshfar |
Department of Chemistry, Ilam University, Ilam, Iran

نشانی اینترنتی https://jns.kashanu.ac.ir/article_112001_bf2c5a275a5d91edb9911b0d416dc033.pdf
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