期刊
MATERIALS RESEARCH BULLETIN
卷 106, 期 -, 页码 228-233出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.06.010
关键词
gamma-CuI crystal growth; Evaporation technique; LiI doping; Luminescence
资金
- Significant National Special Project of the Ministry of Science and Technology of China for Development of Scientific Instruments and Equipment [2011YQ13001902]
- National Natural Science Foundation of China [11475128, 11675121, 11775160]
Large-sized gamma-CuI single crystals with ultrafast scintillation property were grown in LiI acetonitrile solvent through evaporation technique. The LiI exhibits unique properties to gamma-CuI single crystal preparation. One is that it increases the solubility of CuI in the solvent, which gives rise to a largest-sized (23 x 14 x 2 mm(3)) single crystal with the high optical transmission (over 60%) in the wavelength region of 435-800 nm. The other feature is that it acts as an effective isoelectronic dopant and improves the molar ratio of copper to iodine, which greatly enhances the near-band-edge emissions (411 and 432 nm) and suppresses the broadband emission (680 nm). The decay time of the fast emission under pulsed X-ray excitation is shorter than 450 ps. The results will give a guidance for optimizing the properties of gamma-CuI single crystal as an ultrafast scintillator.
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