کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5366425 1388349 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Morphological and chemical study of the initial growth of CdS thin films deposited using an ammonia-free chemical process
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Morphological and chemical study of the initial growth of CdS thin films deposited using an ammonia-free chemical process
چکیده انگلیسی

We study the initial growth stages of CdS thin films deposited by an ammonia-free chemical bath deposition process. This ammonia-free process is more environmentally benign because it reduces potential ammonia release to the environment due to its high volatility. Instead of ammonia, sodium citrate was used as the complexing agent. We used atomic force microscopy (AFM), Rutherford backscattering (RBS) and X-ray photoelectron spectroscopy (XPS) to investigate the morphological and chemical modifications at the substrate surface during the first initial stages of the CdS deposition process. Additionally, X-ray diffraction (XRD) and optical transmission spectroscopy measurements were carried out to compliment the study. XPS results show that the first nucleation centers are composed by Cd(OH)2 which agglomerate in patterns of bands, as demonstrated by AFM results. It is also observed that the conversion to CdS (by anionic exchange) of the first nucleus begins before the substrate surface is completely covered by a homogenous film.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 254, Issue 2, 15 November 2007, Pages 499-505
نویسندگان
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