Multi-electrochromism behavior and electrochromic mechanism of electrodeposited molybdenum doped vanadium pentoxide films
Multi-electrochromism behavior and electrochromic mechanism of electrodeposited molybdenum doped vanadium pentoxide films
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电沉积钼掺杂五氧化二钒薄膜的多重电致变色行为及电致变色机理
DOI：
10.1016/j.electacta.2010.06.047
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发表时间：
2010-09-01
影响因子：
6.6
通讯作者：
Jian, Zelang
中科院分区：
文献类型：
--
作者：
Jin, Aiping;Chen, Wen;Jian, Zelang
在Mo掺杂V2O5溶胶的基础上，通过阴极电沉积法制备钼掺杂五氧化二钒（Mo掺杂V2O5）薄膜。作为一种阳极和阴极着色电致变色材料，电沉积的Mo掺杂V2O5薄膜具有良好的循环稳定性、可逆性和多电致变色行为（橙色-V2O5-绿蓝），在550-900 nm光谱区域的光调制率为60-90%。这是由于Mo6+和Vs+、V4+态之间的电子间价转移增强，以及V5+和V4+跃迁的结果。用原子力显微镜研究了Mo掺杂V2O5薄膜的电致变色机理。x射线衍射、x射线光电子能谱和电化学阻抗能谱。在不同的着色状态下，由于结晶度的增加，膜的表面粗糙度增大。宿主V2O5层间间距的变化以及C、Li元素状态的变化证实了有机溶剂插入宿主V2O5层间，部分Li+离子进入V-O层的位置。电致变色动力学过程表明，Mo掺杂V2O5薄膜的电致变色可以认为是伴随着Li+离子和电子的插入/提取的可逆还原/氧化过程。英国皇家版权所有(C) 2010出版的爱思唯尔有限公司版权所有。
Molybdenum doped vanadium pentoxide (Mo doped V2O5) films are prepared by cathodic electrodeposition on indium tin oxide substrate from Mo doped V2O5 sol. As an anodic and cathodic coloration electrochromic material, the electrodeposited Mo doped V2O5 film presents a better cycling stability, reversibility and multi-electrochromic behavior (orange-V2O5-green-blue) with an optical modulation of 60-90% in the spectral region 550-900 nm, which can be expected as a result of enhanced electron intervalence transfer between Mo6+ and Vs+, V4+ states, in addition to V5+ and V4+ transition. The electrochromic mechanism of Mo doped V2O5 films is investigated with atomic force microscopy. X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy. The surface roughness of the film increase at the different coloration states due to the increasing crystallinity degree. The change of the interlayer spacing for the host V2O5 and the change of the C and Li element states verify the insertion of organic solvent into the interlayer of the host V2O5 and some of the Li+ ions into the sites in the V-O layers. The electrochromic kinetics process indicates that the electrochromism of Mo doped V2O5 films can be considered as a reversible reduction/oxidation process accompanying the insertion/extraction of Li+ ions and electrons. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.