An overview and experimental analysis of WO_(3)/TiO_(2)composite with enhanced electrochromic properties for smart windows application

作     者：Ayesha Khan Mayur A.Gaikwad Jin Hyeok Kim Anamika Kadam 

作者机构：The Institute of ScienceDr.Homi Bhabha State UniversityNo.15 Madam Cama RoadMumbai400032India Optoelectronics Convergence Research Center and Department of Materials Science and EngineeringChonnam National UniversityGwangju61186South Korea 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2024年第6卷第4期

页      面：732-747页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the Human Resources Development Program(No.20194030202470)of the Korea Institute of Energy Technology Evaluation Planning(KETEP)with the support of the Korean Government Ministry of Trade,Industry and Energy the Department of Science and Technology,India,under the DST-FIST(SR/FST/PSI173/2012)program 

主　　题：Electrochromism WO_(3)/TiO_(2) Stability Smart window 

摘      要：Internationally,standards for electrochromic(EC)requirements in smart window applications have been established,with ongoing global initiatives aimed at elevating them to highly advanced *** paper covers a comprehensive investigation of the structural,optical,morphological,and electrochemical properties of WO_(3)/TiO_(2)composite ***,an experimental analysis of WO_(3)/TiO_(2)was envisaged by a two-step ***,WO_(3)thin films were hydrothermally deposited onto indium-doped tin oxide-coated glass substrates using an aqueous solution of Na_(2)WO_(4)·2H_(2)O at a pH value of ***,a layer of TiO_(2)was electrodeposited onto the WO_(3)thin films.X-ray diffraction analysis confirmed the successful formation of WO_(3)/TiO_(2)composite films,with the WO_(3)phase exhibiting a hexagonal tunnel *** electron microscopy revealed the formation of porous nanorods(NRs)of WO_(3),uniformly coated with TiO_(2),resulting in a porous morphology of the WO./TiO_(2)*** EC performance of the WO_(3)/TiO_(2)films was thoroughly assessed through cyclic voltammetry and chronoamperometry measurements over a potential window ranging from-2.0 to+1.2 V(versus Ag/AgCl)in a 0.5 mol·L^(-1)LiClO_(4)-PC *** WO_(3)/TiO_(2)composite films exhibited cathodic electrochromism,characterized by a reversible color change from dark blue to *** improved EC performance in comparison to pure WO_(3)films is attributed to enhanced double ion/electron insertion and extraction ***,the WO_(3)/TiO_(2)composite films demonstrated excellent optical modulation properties,with a significant modulation at 633 nm(46.87%).The coloration efficiency reached a high value of 193.25 cm^(2)·C^(-1),indicating their potential for practical EC ***,the WO_(3)/TiO_(2)composite films displayed exceptional EC stability,with no significant degradation observed over 2500 cyclic voltammetry *** superior EC