Chalcogenide Ions Stabilized(F2+)H-Like Color Centers in NaCl Crystal
Lin Bizhou;Xu Chenghuang;Wu Jihuai;Qiu Jizhan
1998, 27(1):
104.
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The preparation procedures of(F2+)H centers in chalcogenide ions doped NaCl crystals are described,absorption and emission spectra are studied. The stability of these centers in the dark at room temperature is also mearsured.It is revealed that the increase of the stabilized effect of chalcogenide ions on F2+ centers is in the sequence of ions O2-,Se2-,S2-and that the increase of the shift magnitude of spectral positions based on these defects comparing with pure F2+ center is in the same sequence. The sequence is the same as the electron affinity sequence,While the electron affinity of the chalcogenide elements is 1.47,2.02,2.07eV,respectively.It is also experimentally found that with increase of the chalcogenide ion size,the growth of good quality doped crystal is achieved more difficultly.
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