کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
81097 | 49422 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochromic characteristics of fibrous reticulated WO3 thin films prepared by pulsed spray pyrolysis technique Electrochromic characteristics of fibrous reticulated WO3 thin films prepared by pulsed spray pyrolysis technique](/preview/png/81097.png)
The electrochromic (EC) behavior of fibrous reticulated WO3 films prepared from ammonium tungstate precursor by pulsed spray pyrolysis method was investigated. All the films were prepared using identical technological parameters and a thorough investigation of the electrochromic properties of the films deposited at 300 °C is reported. The structural properties were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochromic and optical properties were measured using cyclic voltammetry and ultraviolet (UV)-visible spectrophotometry. The films are amorphous and have a fibrous reticulate-like morphology having micron-size circular rings. The films show high transparency in the visible range and the optical band gap energy is about 3.1 eV. Electrical measurements show that the resistivity monotonically decreases as temperature increases, which indicates thermal hopping transport. The activation energy for hopping transport is of the order 4×10−4 eV. The electrochromic coloration efficiency (CE) is found to be 34 cm2/C at 630 nm.
Journal: Solar Energy Materials and Solar Cells - Volume 91, Issue 12, 23 July 2007, Pages 1097–1101