Luminescence of crystals of divalent tungstates
Luminescence of crystals of divalent tungstates
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DOI：
10.1134/1.1887903
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发表时间：
2005-03-01
影响因子：
0.7
通讯作者：
Yakimova, IO
中科院分区：
文献类型：
--
作者：
Blistanov, AA;Zadneprovskii, BI;Yakimova, IO
二价钨酸盐晶体具有两个主要的发光光谱范围：390-420 nm范围内的短波长（蓝色）发光带和480-520 nm范围内的一组（通常是两组）较长波长（绿色）发光带。对于钨酸钙、锶、钡、镉、镁、锌和铅晶体，蓝色发光带最大值对应的波长（λ (max)）与这些化合物的熔化温度（T-m）相关。不同二价阳离子晶体的蓝色发光带位置相同（在510-530 nm范围内）。真空退火和电子辐照降低了蓝、绿发光带的强度，但不改变其最大强度的比值。这种情况表明，空位在更大程度上充当发光猝灭剂，而不是促进形成负责特定发光带的发射中心。(c) 2005年出版公司。
Crystals of divalent tungstates are characterized by two main luminescence spectral ranges: a short-wavelength (blue) luminescence band in the range 390-420 nm and a group (often two groups) of longer wavelength (green) bands in the range 480-520 nm. For crystals of calcium, strontium, barium, cadmium, magnesium, zinc, and lead tungstates, it is shown that the wavelength corresponding to the maximum of the blue luminescence band (lambda(max)) correlates with the melting temperature (T-m) of these compounds. The position of the blue luminescence band is the same (in the range 510-530 nm) for crystals with different divalent cations. Annealing in vacuum and electron irradiation decrease the intensity of both blue and green luminescence bands but do not change the ratio of their maximum intensities. This circumstance suggests that vacancies serve as luminescence quenchers to a greater extent rather than facilitate the formation of emission centers responsible for a particular luminescence band. (c) 2005 Pleiades Publishing, Inc.