Effect of humidity on structure and electrochromic properties of sol–gel-derived tungsten oxide films

Microstructural and electrochromic properties of tungsten oxide thin films produced by surfactant mediated electrodeposition

“…These structural attributes cumulatively deliver greater electrochemical interfacial lithium transfer as compared to sol-gel derived WO 3 films. A diffusion coefficient of 1.2 Â 10 À11 cm 2 s À1 determined for this film (from a CV recorded at 1 mV s À1 ) complies with D Li þ in the range of 10 À9 to 10 À12 cm 2 s À1 , typically observed for tungsten oxide films obtained via wet chemistry routes [41,42]. Zhong et al [43] have previously associated the fast diffusion of ions with grain boundaries in evaporated WO 3 film and this line of reasoning can explain the fast kinetics observed for the films prepared in this report.…”

“…Above 4000 cycles, optical modulation decreases drastically, which is indicative of the film's degradation. The color-bleach speeds observed for the virgin film herein are far superior to the switching times of the order of a few minutes previously observed by us for sol-gel derived WO 3 layers [40][41][42]. The cycling durability of the film generated via template-assisted electrodeposition is better than that of WO 3 films prepared by sol-gel.…”

A high-temperaturein situcell with a large solid angle for fluorescence X-ray absorption fine structure measurement

“…This cell also has no water-cooling system because the Kapton window temperature was kept at less than 373 K due to the high thermal conductivity of Al, even at a sample temperature of 703 K. The system can be applied to reaction analysis of solid oxide, bimetallic catalyst for fuel cells, [19][20][21][22] and in situ analysis of W oxide photo/electrochromic materials. 54,55 These powder samples are loaded into a small container made of BN or graphite and fixed to the heater. The cell is thus universally applicable to many systems in the measurements of fluorescence XAFS under the reaction conditions.…”

Sol Jel Döndürme Yöntemiyle Hazırlanan WO3 Nano Yapılı Filmlerin Yapısal, Optik ve Elektrokromik Özelliklerine Parçacık Boyutunun Etkisi

“…Yapısı itibariyle fonksiyonel, ucuz ve yüksek renklenme katsayısına sahip WO3 filmler, çok iyi elektrokromik özellikler sergilemesinden dolayı enerji tasarruflu akıllı pencerelere, parlamayı önleyici aynalara, otomobil ve bina tavan camlarına uygulanmaktadır. Sıçratma, sol jel, kimyasal buhar depolama, sprey kaplama ve vakum buharlaştırma gibi çeşitli kaplama yöntemleri kullanılarak WO3 filmler kaplama yapılabilmektedir [5][6][7][8][9][10]. Homojen, pratik, dengeli, ekonomik ve hızlı bir kinetik yapıya sahip sol-jel yöntemi, WO3 yapıların kristal boyutlarını ve mikro yapılarını kontrol edebilme imkanı sağlamaktadır.…”