کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6534392 | 1420646 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of particle size and amorphous phase on the electrochromic properties of kinetically deposited WO3 films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of particle size and amorphous phase on the electrochromic properties of kinetically deposited WO3 films Effect of particle size and amorphous phase on the electrochromic properties of kinetically deposited WO3 films](/preview/png/6534392.png)
چکیده انگلیسی
The electrochromic (EC) performance of a WO3 film fabricated using a kinetic spray technique (nanoparticle deposition system, NPDS) was examined as a function of the particle size and phase of the WO3 particles. The total transmittance change of the deposited WO3 film containing crystalline nano-sized WO3 particles was 56% at 800Â nm, which resulted in a large shift in its transmission spectrum after coloring. Moreover, the charge density of the EC film using crystalline nano-sized WO3 particles was 22.06Â mCÂ cmâ2, which was 2.8 times higher than that of the film composed of crystalline micro-sized WO3 particles (7.97Â mCÂ cmâ2). Using crystalline nano-sized WO3 particles greatly increased the surface area, increased the number of absorption sites for Li ions inside the film, and thereby improved the charge density and transmittance. The transmittance change of the EC films using dual-phased nano-sized WO3 particles was 64% (at 800Â nm), which was still higher than that with crystalline nano-sized WO3 particles. The amorphous phase in the dual-phase nano-sized WO3 film provided good diffusion of Li ions; it had a high diffusion coefficient of 1.53 Ã 10â12Â cm2Â sâ1 that derived from its loosely packed atomic structure. The amorphous region in a heterostructured WO3 film was effective for the fast diffusion of Li ions, while the crystalline nano-sized region in such a film provided a large surface area for an increased number of absorption sites for Li ions. This resulted in a dramatic improvement of the EC performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 177, April 2018, Pages 44-50
Journal: Solar Energy Materials and Solar Cells - Volume 177, April 2018, Pages 44-50
نویسندگان
Hyungsub Kim, Dahyun Choi, Kwangmin Kim, Wonshik Chu, Doo-Man Chun, Caroline Sunyong Lee,