Reversible photochromic effects in doped single crystals of bismuth germanium (Bi12GeO20) and bismuth silicon oxide (Bi12SiO20)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Reversible photochromic effects in doped single crystals of bismuth germanium (Bi₁₂GeO₂₀) and bismuth silicon oxide (Bi₁₂SiO₂₀)

Authors:	W. Wardzynski T. Łukasiewicz J. Żmija

Affiliation:	Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland;Military Academy of Technology, Poland

Abstract:	Absorption of Bi₁₂GeO₂₀ and Bi₁₂SiO₂₀ single crystals doped with Mn and Cr were investigated before and after illumination with visible light. Pronounced photochromic effects were found. The effects are explained in terms of light induced charge transfer Mn⁴⁺→Mn⁵⁺ and Cr³⁺→Cr²⁺.

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