Excitonic emission of scheelite tungstates AWO4 (A=Pb, Ca, Ba, Sr)
Excitonic emission of scheelite tungstates AWO4 (A=Pb, Ca, Ba, Sr)
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DOI：
10.1016/s0022-2313(99)00569-4
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发表时间：
2000-05
影响因子：
3.6
通讯作者：
M. Nikl;P. Boháček;E. Mihóková;Masaaki Kobayashi;M. Ishii;Y. Usuki;V. Babin;A. Stolovich;S. Z
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文献类型：
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作者：
M. Nikl;P. Boháček;E. Mihóková;Masaaki Kobayashi;M. Ishii;Y. Usuki;V. Babin;A. Stolovich;S. Z
Self-trapped exciton emission spectra of four scheelite tungstate single crystals AWO4(A=Pb, Ca, Sr, Ba) were measured in a wide temperature range and their structure is discussed. We present decay kinetics of PbWO4in 0.35–300K range and a mathematical model, which successfully approximates temperature dependencies of the decay time and intensity with a unique set of parameters. Besides the usual thermal quenching also thermally induced exciton disintegration, which has been evidenced in earlier experiments, is considered.
