کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
193335 459766 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Morphology effect on the electrochromic and electrochemical performances of NiO thin films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Morphology effect on the electrochromic and electrochemical performances of NiO thin films
چکیده انگلیسی

NiO thin films on ITO substrate were prepared by chemical bath deposition (CBD) and sol–gel method, respectively. The microstructure and morphology of the NiO films were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Both the films have polycrystalline cubic NiO, but have distinct morphology. The CBD NiO thin film with a highly porous structure exhibited a noticeable electrochromic performance. The variation of transmittance was high up to 82% at 550 nm and the coloration efficiency (CE) was calculated to be 42 cm2 C−1. The sol–gel NiO thin film with a smoothly compact structure presented 35% and 28 cm2 C−1 at 550 nm, respectively. The electrochemical properties of both the NiO thin films were investigated in 1 M KOH electrolyte by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements. The CV and EIS measurements revealed that the CBD NiO thin film had better electrochemical reversibility, higher reactivity and reaction kinetics due to its highly porous structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 53, Issue 18, 20 July 2008, Pages 5721–5724
نویسندگان
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