Photoluminescence Properties of trans-4,4'-Diamino-stilbene in Polyvinyl alcohol) Films
نویسندگان
چکیده
Experimental studies have shown that the nonpolar molecule 4,4'-diamino-stilbene (DAS) in polyvinyl alcohol) film (PVA) at 296 K, apart from fluorescence displays phosphorescence whose intensity differs only slightly from that observed at 84 K. The overlapping of fluorescence and phosphorescence bands is the reason of the unusual behaviour of the emission anisotropy in the longwave absorption and photoluminescence bands. A distinct effect of direct irradiation on the intensity of these bands was observed.
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