1. Growth of PBI2 single crystals from stoichiometric and Pb excess melts
- Author
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Hayashi, T., Kinpara, M., Wang, J.F., Mimura, K., and Isshiki, M.
- Subjects
- *
LEAD compounds , *CRYSTALLOGRAPHY , *SPECTRUM analysis , *CRYSTAL growth - Abstract
Abstract: We have successfully grown high-purity and -quality PbI2 single crystals by the vertical Bridgman method. The rocking curves of four-crystal X-ray diffraction (XRD) show 120arcsec in full-width at half-maximum (FWHM). The photoluminescence (PL) spectra at 7.8K show the resolved intensive exciton emission line and the weak DAP emission band. The deep-level emissions are not observed. The measurement of the electrical and radiographic properties show that Leadiodide (PbI2) single crystal has a resistivity of 5×1010 Ωcm and imager lag is 8s, respectively. In order to improve the controllability of crystal growth, PbI2 single crystals were also grown from a lead (Pb) excess PbI2 source. The experimental results show very good reproducibility. In addition, the growth models of crystal are proposed, and the growth mechanism is discussed. [Copyright &y& Elsevier]
- Published
- 2008
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