CeO2修饰的透明TiO2纳米管电极的电致变色器件

doi:10.3724/SP.J.1077.2012.00074

无机材料学报 ›› 2012, Vol. 27 ›› Issue (1): 74-78.DOI: 10.3724/SP.J.1077.2012.00074 CSTR: 32189.14.SP.J.1077.2012.00074

CeO₂修饰的透明TiO₂纳米管电极的电致变色器件

文豪^{1, 2}, 刘志甫¹, 杨群保¹, 李永祥¹

(1. 中国科学院上海硅酸盐研究所, 上海200050; 2. 中国科学院研究生院, 北京100049)

收稿日期:2011-04-15 修回日期:2011-06-07 出版日期:2012-01-09 网络出版日期:2011-12-19
作者简介:文豪(1984-), 女, 博士研究生. E-mail: wenhao@oceanoptics.com
基金资助:
科技部973项目(2009CB939904);国家自然科学基金 (50703047);上海市科委-AM基金 (09520714500)

Enhanced Electrochromic Properties by Using a CeO₂ Modified TiO₂ Nanotube Array Transparent Counter Electrode

WEN Hao^{1, 2}, LIU Zhi-Fu¹, YANG Qun-Bao¹, LI Yong-Xiang¹

(1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China)

Received:2011-04-15 Revised:2011-06-07 Published:2012-01-09 Online:2011-12-19
Supported by:
The Ministry of Sciences and Technology of China through 973-Project (2009CB939904);National Natural Science Foundation of China (50703047);Shanghai-Applied Materials Research & Development Foundation (09520714500)

摘要/Abstract

摘要：

采用电化学沉积法在阳极氧化制备的TiO₂纳米管阵列管壁上沉积一层CeO₂纳米颗粒, 再将CeO₂修饰的透明TiO₂纳米管阵列薄膜对电极与聚三甲基噻吩变色电极组装成透过型电致变色器件. 实验结果表明: CeO₂修饰的TiO₂纳米管阵列薄膜仍保持良好的光透过性, 其电荷存储能力比纯TiO₂纳米管电极提高了30%. 经CeO₂修饰的TiO₂纳米管改善了器件的性能, 与对电极为单一TiO₂纳米管阵列的器件相比, 其对比度仍保持在38%左右, 其褪色时间由1.3 s缩短为0.8 s. 电致变色器件快速响应得益于纳米管与纳米颗粒组成的复合结构的高比表面积和快速的电荷传输过程.

关键词: 氧化铈, 氧化钛, 纳米管阵列, 电致变色, 对电极

Abstract:

A new kind of electrochromic device composed of a CeO₂ modified TiO₂ nanotube array counter electrode and a working electrode of P3MeT film was reported. The counter electrode was fabricated by electrodepositing CeO₂ nanoparticles onto the walls of anodized TiO₂ nanotubes. The CeO₂ modified TiO₂ nanotube array counter electrode keeps a high transparency under working voltage. The charge capacity of CeO₂ modified TiO₂ nanotube array has an increase of 30% than that of un-modified TiO₂ nanotube array electrode. Compared with the electrochromic device with a TiO₂ nanotube array film electrode, the CeO₂modified TiO₂ nanotube counter electrode based EC device has a fast decoloration time of 0.8 s. The fast response attributes to the high effective surface area and the fast charge transportation along the nanotube walls.

Key words: CeO₂, TiO₂, nanotube, electrochromic, counter electrode

中图分类号:

TQ34

文豪, 刘志甫, 杨群保, 李永祥. CeO₂修饰的透明TiO₂纳米管电极的电致变色器件[J]. 无机材料学报, 2012, 27(1): 74-78.

WEN Hao, LIU Zhi-Fu, YANG Qun-Bao, LI Yong-Xiang. Enhanced Electrochromic Properties by Using a CeO₂ Modified TiO₂ Nanotube Array Transparent Counter Electrode[J]. Journal of Inorganic Materials, 2012, 27(1): 74-78.

图/表 8

图1 光电响应性能测试系统示意图

Fig. 1 Schematic diagram of the measuring setup for transmittance and electrochromic response tests

图2 电致变色器件的结构示意图

Fig. 2 Schematic diagram of electrochromic devices

图3 (a) G-ATO和(b) G-ATO/CeO2的扫描电镜照片

Fig. 3 SEM images of (a) G-ATO and (b) G-ATO/CeO2

图4 CeO2, G-ATO和G-ATO/CeO2 三种对电极的循环伏安曲线(v=0.1 V/s)

Fig. 4 Cyclic voltamatic curves of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 (v=0.1 V/s)

图5 CeO2、G-ATO和G-ATO/CeO2三种对电极的充放电电荷密度曲线

Fig. 5 Chronoamperograms of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2

图6 CeO2、G-ATO 和G-ATO/CeO2三种对电极在非工作状态的透过率

Fig. 6 Transmittance curves of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 in non-working status

图7 恒定电压分别为-1.5 V和+1.2 V, 基于三种对电极CeO2、G-ATO 和G-ATO/CeO2的电致变色器件的透光率

Fig. 7 Transmittance of the electrochromic devices with different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 under the constant voltages of -1.5 V and +1.2 V, respectively

图8 电致变色器件光透过率随时间的变化

Fig. 8 Transmittance response of the electrochromic devices with time change

参考文献 18

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CeO₂修饰的透明TiO₂纳米管电极的电致变色器件

Enhanced Electrochromic Properties by Using a CeO₂ Modified TiO₂ Nanotube Array Transparent Counter Electrode

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