电子束蒸发氧化镍薄膜的电致变色性能

应用科学学报 ›› 1999, Vol. 17 ›› Issue (2): 221-226.

电子束蒸发氧化镍薄膜的电致变色性能

吴永刚, 吴广明, 倪星元, 周箴, 张慧琴, 吴翔

同济大学

收稿日期:1997-12-14 修回日期:1998-04-01 出版日期:1999-06-30 发布日期:1999-06-30

Electrochromic Characteristics of Electron-Beam Evaporated Nickel Oxide Films

WU YONGGANG, WU GUANGMING, NI XINGYUAN, ZHOU ZHEN, ZHANG HUIQING, WU XIANG

Tongji University, Shanghai 200092

Received:1997-12-14 Revised:1998-04-01 Online:1999-06-30 Published:1999-06-30

摘要/Abstract

摘要： 在充氧气氛的真空室中用电子束快速蒸发NiO粉末颗粒的方法制备了氧化镍薄膜,所制备的薄膜在-0.6~+0.8V电势下无需活化即已具有很好的电致变色性能,在550nm波长的透射率变化范围达23.4%~92.0%.在初始的几十次电化学循环中,薄膜致色深度随循环次数的增加而加深,稳定后的最大透射率调制范围在可见光谱达20.5%~77.4%,太阳光谱为27.2%~69.1%.薄膜在致色时的电流响应时间为15s,消色时响应时间为7s.电化学循环时,阳极和阴极电流随循环次数而增加,表明薄膜中活化中心随循环次数而逐渐增加.

关键词: 电致变色, 电子束蒸发, 氧化镍薄膜

Abstract: In this paper, nickel oxide films are deposited by rapid electron-beam evaporating NiO powder pellet in the presence of a selected oxygen pressure. The deposited films show superior electrochromic properties without activation process, transmittance variation of 23.4%~92.0% at 550nm can be achieved at the second cycle of cyclic voltammetry between -0.6 and +0.8V. In the initial dozens of cycles, the transmittance of the colored state is lowered gradually, but the transmittance of the bleached state retains the same as the original state. The anodic and cathodic current increase, while the cathodic current peak shifts to lower potentials with the cycling. The maximum transmittance variation reachs 20.5%~77.4%in the photopic vision spectra and 27.2%~69.1% in the solar spectra when the cycling reachs stable. Switching times for coloration and bleaching are 15s and 7s respectively.

Key words: electron-beam evaporation, nickel oxide film, electrochromism

吴永刚, 吴广明, 倪星元, 周箴, 张慧琴, 吴翔. 电子束蒸发氧化镍薄膜的电致变色性能[J]. 应用科学学报, 1999, 17(2): 221-226.

WU YONGGANG, WU GUANGMING, NI XINGYUAN, ZHOU ZHEN, ZHANG HUIQING, WU XIANG. Electrochromic Characteristics of Electron-Beam Evaporated Nickel Oxide Films[J]. Journal of Applied Sciences, 1999, 17(2): 221-226.