Title
Sensitive triplet exciton detection in polyfluorene using Pd-coordinated porphyrin
Author
Mikhnenko, O.V.
Blom, P.W.M.
Loi, M.A.
Publication year
2011
Abstract
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.
Subject
Mechatronics, Mechanics & Materials
HOL - Holst
TS - Technical Sciences
Materials
Industrial Innovation
fluorene derivative
metalloporphyrin
palladium
poly(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)
polymer
thiophene derivative
article
artificial membrane
chemistry
Fluorenes
Membranes, Artificial
Metalloporphyrins
Palladium
Polymers
Thiophenes
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http://resolver.tudelft.nl/uuid:4c1375a0-7033-4808-8c9f-f8f6a033b87b
TNO identifier
461428
ISSN
1463-9076
Source
Physical Chemistry Chemical Physics, 13 (32), 14453-14456
Document type
article