Electrolytic reduction of Tl+ ions in KCl crystals
Electrolytic reduction of Tl+ ions in KCl crystals
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KCl 晶体中 Tl 离子的电解还原
DOI：
10.1016/j.optmat.2006.11.006
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发表时间：
2007
影响因子：
3.9
通讯作者：
V. Topa
中科院分区：
文献类型：
--
作者：
S. Polosan;T. Tsuboi;Elena Simona Apostol;V. Topa
对掺杂Tl+离子和掺杂Tl+、Ca2+离子的KCl晶体进行了电解着色。在两种有色晶体中观察到Tl+吸收带强度下降，同时观察到一些新的吸收和发射带。它们是由Tl+离子在电解着色过程中通过电子注入转化而成的Tl−离子。KCl:Tl和KCl:Tl+Ca晶体有不同的吸收和发射带。彩色KCl:Tl和彩色KCl:Tl+Ca分别在285nm和400和503nm处出现尖锐的吸收带。彩色KCl:Tl在1470、1600和2185nm处观测到红外发射带，彩色KCl:Tl+Ca在1630和1900nm处观测到红外发射带。认为KCl:Tl+Ca中的吸收和发射带是由于Tl离子受到Ca2+或最近邻空位的扰动所致。
Electrolytic coloration has been made for KCl crystals doped with Tl+ions and doped with Tl+and Ca2+ions. Intensity decrease of the Tl+absorption bands is observed in the two colored crystals, while several new absorption and emission bands are observed. They are attributed to Tl−ions which were converted from Tl+ions by electron injection during electrolytic coloration. Different absorption and emission bands are observed for KCl:Tl and KCl:Tl+Ca crystals. Sharp absorption band appears at 285nm in the colored KCl:Tl and at 400 and 503nm in the colored KCl:Tl+Ca. Infrared emission bands are observed at 1470, 1600 and 2185nm in colored KCl:Tl, while at 1630 and 1900nm in colored KCl:Tl+Ca. It is suggested that the absorption and emission bands in KCl:Tl+Ca are due to Tl−ions perturbed by Ca2+or vacancy at the nearest neighbor.