退火处理后的CsI:Pb晶体在10～30K温度范围内观察到两类发光:当激发波长为410nm,主要发光带在464nm附近;而当激发波长为360nm或300nm,主发射带为422nm。这两种发光带的相对强度与退火时间的长短密切相关。讨论了CsI:Pb晶体中不同的Pb2＋基聚集相的形成机制和发光机理。
Two luminescence phases were observed in annealed CsI:Pb crystals at the 10～30K tem－perature range, which are dominant emission round 464 nm with the excitation at 410 nm and domi－nant emission round 422 nm with the excitation about 360 nm and 300 nm, respectively. It was found that their relative intensities depend strongly on the annealing time and the origin of the emission bands and the formation mechanism of different Pb2＋－based aggregates is discussed.
参考文献
| [1] | Nikl M;Nitsch K;Polak K;Mihokova E;Zazubovich S;Pazzi GP;Fabeni P;Salvini L;Aceves R;BarbosaFlores M .Quantum size effect in the excitonic luminescence of CsPbX3-like quantum dots in CsX (X=Cl, Br) single crystal host[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,1997(0):377-379. |
| [2] | Nikl M.[A].BostonUSA,1998 |
| [3] | Heidrich K;Kunzcl H;Trench J .[J].Solid State communications,1984,25:887. |
| [4] | Babin V.8 th Europhys Conf On Def In Ins Mater[C].KeeleUK,1998 |
| [5] | Nitsch K et al.[J].Journal of Crystal Growth,1993,131:612. |
| [6] | Nikl M.(in press[J].Journal of Physics:Condensed Matter |
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