CsCl:Pb〔2+〕結晶におけるCsPbCl3相と孤立Pb〔2+〕イオンによる光学的性質

概要

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Isolated Pb2+ ions monodispersed in CsCl crystals aggregate to form CsPbCl3 phases via a direct process by annealing at lower temperature (473 K).There occurs discrete-energy excition absorption in growing CsPbCl3 phases. The aggreegation process is well interpreted in terms of the plate model of the CsPbCl3 phases proposed by Nikl et al.For annealing at higher temperature (573 and 673 K),the absorption and emission spectra exhibit complicating changes,then the formation of Cs4PbCl6 phases is confirmed by the 3.5 eV emission band. As to the 4.1,4.3 and 5.6 eV absorption bands due to isolated Pb2+ ions, these are attributed to the same origin, and the splitting between 4.1 and 4.3 eV absorption bands are different from that between A1 and A2 bands for Pb2+ ions in NaCl-type structure.
福井大学工学部の論文