کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1786685 1023422 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Green route fast synthesis and characterization of chemical bath deposited nanocrystalline ZnS buffer layers
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Green route fast synthesis and characterization of chemical bath deposited nanocrystalline ZnS buffer layers
چکیده انگلیسی

Zinc sulphide (ZnS) thin films are deposited using chemical bath deposition method on the glass substrates in an aqueous alkaline reaction bath of zinc acetate and thiourea along with non-toxic complexing agent tri-sodium citrate at 95 °C. The results show noteworthy improvement in the growth rate of the deposited ZnS thin films and thickness of the film increases with the deposition time. From X-ray diffraction patterns, it is found that the ZnS thin films exhibit hexagonal polycrystalline phase reflecting from (101) and (0016) planes. The high resolution transmission electron microscopy studies confirmed the formation of hexagonal phase from the d-value calculation which was 0.3108 nm. X-ray photoelectron spectroscopy reveals that the Zn–S bonding energy is at 1022.5 and 162.1 eV for Zn 2p3/2 and S 2p1/2 states, respectively. Field emission scanning electron microscopy study shows that deposited thin films are highly uniform, with thin thickness and completely free from large ZnS clusters which usually form in aqueous solutions. Atomic force microscopy investigates that root mean square values of the ZnS thin films are from 3 to 4.5 nm and all the films are morphologically smooth. Energy dispersive spectroscopy shows that the ZnS thin films are relatively stoichiometric having Zn:S atomic ratio of 55:45. It is shown by ultraviolet–visible spectroscopy that ∼90% transmittance and ∼10% absorbance for the ZnS films in the visible region, which is significantly higher than that reported elsewhere and the band gap energy of the ZnS films is found to be 3.76, 3.74, and 3.71 eV, respectively.


► ZnS thin films were prepared by CBD method using non-toxic complexing agent at short deposition time.
► Uniformity and transmittance of the ZnS thin films were very high.
► Use of proper molar Na3-citrate and well optimized conditions give rise to high quality buffer layers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 13, Issue 5, July 2013, Pages 850–856
نویسندگان
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