Optical studies on the conversion from Ag+ to Ag- centers by the electrolytic coloration in NaCl and KCl crystals

被引：2

作者：

Kawai, Teketoshi ^{[1
]}

Hirai, Takeshi ^{[2
]}

Bando, Kazuki ^{[3
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Sci, Dept Phys Sci, Gakuen Cho 1-1, Sakai, Osaka 5998531, Japan

[2] Ritsumeikan Univ, Fac Sci & Engn, Dept Phys Sci, Noji Higashi 1-1-1, Shiga 5258577, Japan

[3] Shizuoka Univ, Dept Phys, Fac Sci, Suruga ku, 836 Ohya, Shizuoka 4228529, Japan

来源：

OPTICAL MATERIALS | 2018年 / 77卷

关键词：

Ag+ center; Ag-; center; Electrolytic coloration; Alkali chloride; ALKALI-HALIDE CRYSTALS; EXCITED-STATES; IONS; ABSORPTION; SILVER; LUMINESCENCE; LATTICE; ATOMS; CU;

D O I：

10.1016/j.optmat.2018.01.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated optical spectra of uncolored and electrolytically-colored NaCI:Ag+ and KCI:Ag+ crystals at low temperatures. In the uncolored crystals, the several absorption bands due to the 4d(10) -> 4d(9)5s transitions in Ag+ ions are observed in the energy region below the absorption edge of the host crystals. When the uncolored crystals are electrolytically colored, the absorption bands due to the Ag+ centers decrease and the C absorption band due to Ag- centers appears with the compensation for the decrease of the absorption bands due to the Ag+ centers. The fact implies that the conversion from the Ag+ to Ag- centers occurs through the electrolytic coloration. In the crystals with the Ag+ concentration below about 10(18) cm(-3), the conversion efficiency from the Ag+ to Ag centers reached more than 60%. The conversion processes from the Ag+ to Ag centers are discussed. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：30 / 33

页数：4

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