Effect of divalent-ions-doping on the ab
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A Abu El-Fadl
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Article
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1999
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Elsevier Science
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English
⚖ 599 KB
Optical absorption measurements near the absorption edge have been studied in the energy range 3-5.5 eV on pure triglycine suphate (TGS) and TGS crystals doped with Cu 2ϩ , Mn 2ϩ or Ni 2ϩ in the temperature range 290-360 K. The temperature dependence of the band gap E g (T) reveals an anomaly at the