ArticleJournal of fluorescence2025
DFT and Experimental Investigation of the Optoelectronic Properties of TFB Polymer for Lasing Application.
Article in Journal of fluorescence, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The current work studies the electronic and optical properties of a conjugated polymer Poly(9,9-dioctylfluorene-alt-N-(4-sec-butylphenyl)-diphenylamine) (TFB) after dissolving in tetrahydrofuran (THF) in different concentrations ranging from 2.5 to 0.6 mg/mL. It shows an absorption maxima at 390 nm, however, an increase in concentration (2.5 mg/ml) gives an additional band at 482 nm. This additional band suggests the presence of ground-state aggregation. On the other hand, its fluorescence spectrum at different concentrations ranging from 30 to 1.88 mg/mL showed two distinctive bands around 433 and 451 nm and a tail at 480 nm. The experimental optical bandgaps of TFB are evaluated to be 2.95-2.83 eV depending on its concentration. Its computed electronic structures (n = 1 to 4) are also explored by using the density functional theory (DFT). The observed fluorescence emission of TFB can be represented by the superposition of three modified Franck-Condon progressions. The transition energy (E
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