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Photophysical behavior of pure and mixed evaporated rhodamine B layers

✍ Scribed by H. Böttcher; O. Hertz; M.A. Fox

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 549 KB
Volume: 160
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)87568-2

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✦ Synopsis

Steady-state and time-resolved absorption and fluorescence spectra of evaporated rhodamine B layers (pure and mixed with NaF) were compared with RhB-polymer layers. Excitation spectra allow for the analysis of aggregate structures. Light harvesting is accomplished via energy transfer from high-lying exciton states to monomers, which otherwise can be quenched by lower, nonemitting exciton states. Aggregation of dye monomers is minimized by increasing quantities of coevaporated NaF.

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