Sensitive triplet exciton detection in polyfluorene using Pd-coordinated porphyrin
article
We developed a sensitive spectroscopic method to probe triplet concentration in thin films of polyfluorene (PF) at room temperature. The energy of photoexcited triplet excitons is transferred to the guest metal-organic complex, meso-tetratolylporphyrin-Pd (PdTPP), and detected as phosphorescent emission. The phosphorescence intensity of PdTPP-PF blends is proportional to the independently measured triplet concentration using photoinduced absorption experiments. The high sensitivity of this method allows room temperature detection of triplet excitons in spin-coated polymer films as thin as 10 nm. We found that the triplet lifetime is independent of PdTPP concentration and therefore this method is nearly non-perturbing for the triplet population. © the Owner Societies 2011.
Topics
fluorene derivativemetalloporphyrinpalladiumpoly(9,9 dioctylfluorene co 3,4 di methylthieno(2,3 b)thiophene)poly(9,9-dioctylfluorene-co-3,4-di-methylthieno(2,3-b)thiophene)polymerthiophene derivativearticleartificial membranechemistryFluorenesMembranes, ArtificialMetalloporphyrinsPalladiumPolymersThiophenes
TNO Identifier
461428
ISSN
14639076
Source
Physical Chemistry Chemical Physics, 13(32), pp. 14453-14456.
Pages
14453-14456
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