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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

碘化铯晶体中Ph2+基聚集相的发光性质

冯锡淇1; 赵建林2; 高明3; S．kapphan3; 张雁行1   

  1. 1． 中国科学院上海硅酸盐研究所无机功能材料开放实验室, 上海 200050; 2． 西北工业大学应用物理系, 西安 710072; 3． Universitat Osnabruck, Fachbereich Physik, Germany
  • 收稿日期:1999-05-20 修回日期:1999-07-20 出版日期:2000-06-20 网络出版日期:2000-06-20

Luminescence Properties of Pb2+-Based Aggregates in CsI Host Crystals

FENG Xi-Qi1; ZHAO Jian-Lin2; GAO Ming3; KAPPHAN S3; ZHANG Yan-Xing1   

  1. 1. Laboratory of Functional Inorganic Materials. Chinese Academy of Sciences, Shanghai Institute of Ceramics, CAS, Shanghai 200050, China;
    2. Dept.of Applied physics, Northwest Polytechnic of University, Xi’an 710072, China; 3. FB Physik, Universitat of Osnabruck,
    49069 Osnabruck Germany
  • Received:1999-05-20 Revised:1999-07-20 Published:2000-06-20 Online:2000-06-20

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摘要： 掺铅的碘化铯（Pb：CsI）晶体在400℃空气中进行热处理可以在晶体中诱导产生发光中心，这些发光中心的激发谱与CS－Pb-I体系中一系列化合物的激子吸收谱相吻合．它们被认为是由该晶体在退火过程中所形成的CsPbI3、Cs4PbI6等聚集相产生的．测量了10～30K温度范围内分别在410nm和360nm波长激发下Ph：CsI的发射谱，观察到各发射谱的相对强度随退火时间而变化，这表明在400℃退火温度下晶体中各类Cs－Ph－I聚集相的形成和转化已十分活跃．

关键词: 掺铅碘化铯, Ph2+基聚集相, 发光性质

Abstract: Luminescence centers were created in the CsI host crystals by annealing of Pb-doped crystals at 400℃ in air. It was found that the excitation spectra of these luminescence centers are coincided
well with the excitation absorption of a series of compounds in the Cs-Pb-I system, which indicates that they are attributed to the creation of CsPbI3, CsPbI6
and other aggregates in the annealing process. The emission spectra of Pb:CsI crystals were measured in the 10-30K temperature range by 360nm and 410nm excitation respectively.
The relative intensities of emission bands depend strongly on annealing time, which implies that the creation and transformation of various Pb-based aggregates in Pb:CsI
crystals tend to active around 400℃ annealing temperature.

Key words: Pb-doped CsI, Pb2+-based aggregates, luminescence properties

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