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。
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.
出处
《应用科学学报》
CAS
CSCD
1999年第2期221-226,共6页
Journal of Applied Sciences
关键词
电子束蒸发
氧化镍薄膜
电致变色性能
electron beam evaporation, nickel oxide film, electrochromism
