Some Optical Properties of Lead Activated Potassium Halide Phosphors

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概要

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• Absorption, emission and excitation spectra of KCl:Pb and KBr:Pb have been measured at various temperatures. These observed spectra are similar to those of KCl:TI, and the absorption bands seemed to be due to transitions in Pb^<++> ions which occupies the normal positive ion sites. The two principal excited states are ^1P_1 and ^3P_1 of Pb^<++> ion. 273 mμ absorption, 345 mμ emission in KCl:Pb and 302 mμ absorption, 365 mμ emission in KBr:Pb are attributed to transitions perturbed by surrounding host lattice ions. The excitation to ^1P_1 state does not manifest any distinct emission which is different from the case of Tl activated phosphors. The near ultra-violet emission suffers violent thermal quenching at room temperature, and the activation energies of these nonradiative process are found to be 0.28eV and 0.18eV for KC1:Pb and KBr:Pb, respectively. Several discussions using a single configuration coordinate model are given.

• 1961-08-05

著者

• Kaifu Yozo

  Institute Of Pelyteclznics Osaka City University

• Kaifu Y.

  Institute of Pelyteclznics, Osaka City University

関連論文

• Luminescence of Localized Excitons and Exciton Induced Luminescence in Alkali Halides
• Luminescences from KBr/KI Single Crystals
• Some Optical Properties of Lead Activated Potassium Halide Phosphors

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