%0 Journal Article
%T Electrochromic Performance and Mechanism of Noncrystalline NiO_x H_y Thin Films Fabricated by Electrochemical Deposition<br>电化学沉积非晶NiO_xH_y膜的电致变色特性及其机理
%A 冯博学
%A 谢亮
%A 蔡兴民
%A 蒋生蕊
%A 甘润今
%J 半导体学报
%D 2001
%I 
%X The electrochromic(EC) properties of the electrochemically deposited NiO x H y thin films on glass substrates coated with SnO 2 thin films were studied. The coloring and bleaching transmission rate C t(which is the ratio of coloring light transmission density I c to bleaching light transmission density I b) is found to be 1/10 in the visible spectrum. In KOH electrolyte, the EC process is just the insertion and extraction of a proton or H +. OH - only provides an oxidation and redoxation environment related to coloring/bleaching process. The insertion of H + and its sequential filling the Ni vacancy will cause Ni 3+ to turn into Ni 2+ . The reduction of Ni 3+ then leads to the increase of light absorbance.It is because that the d energy level splits into t 2g and e g energy levels in the octahedral crystal field of NiO 6. The insertion of H + makes t 2g energy level of Ni 3+ occupied by electronics and then transparent.On the contrary, the extraction of H + causes t 2g energy level to lose some electronics and form Ni 3+ , resulting in the increase of light absorbance.
%K electrochemical deposition
%K NiO
%K x
%K H
%K y
%K thin films
%K electrochromism<br>电化学沉积
%K NiOxHy膜
%K 电致变色
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=025C8057C4D37C4BA0041DC7DE7C758F&aid=09247D58369ABA6D&yid=14E7EF987E4155E6&vid=BC12EA701C895178&iid=0B39A22176CE99FB&sid=23104246A5FCFCEF&eid=2BA123C6EB9D54C2&journal_id=1674-4926&journal_name=半导体学报&referenced_num=0&reference_num=0