Chemical bath deposition and characterization of electrochromic thin films of sodium vanadium bronzes

被引：26
|
作者：
Najdoski, Metodija [1 ]
Koleva, Violeta [2 ]
Demiri, Sani [1 ]
机构：
[1] Sts Cyril & Methodius Univ, Inst Chem, Fac Nat Sci & Math, Skopje 1000, Macedonia
[2] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, BU-1113 Sofia, Bulgaria
来源：
MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 03期
关键词：
Thin films; Semiconductors; Chemical synthesis; X-ray diffraction; Electrochemical measurements; LITHIUM INSERTION; CRYSTAL-CHEMISTRY; BEHAVIOR; OXIDES; V2O5;
D O I：
10.1016/j.materresbull.2011.12.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thin yellow-orange films of sodium vanadium oxide bronzes have been prepared from a sodium-vanadium solution (1:1) at 75 degrees C and pH = 3. The composition, structure and morphology of the films have been studied by XRD, IR spectroscopy, TG and SEM-EDX analyses. It has been established that the prepared films are a phase mixture of hydrated NaV6O15 (predominant component) and Na1.1V3O7.9 with total water content of 10.58%. The sodium vanadium bronze thin films exhibit two-step electrochromism followed by color change from yellow-orange to green, and then from green to blue. The cyclic voltammetry measurements on the as-deposited and annealed vanadium bronze films reveal the existence of different oxidation/reduction vanadium sites which make these films suitable for electrochromic devices. The annealing of the films at 400 degrees C changes the composition, optical and electrochemical properties (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：737 / 743
页数：7
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