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Ultrafast Energy Transfer between Disordered and Highly Planarized Chains of Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Unger, Thomas Panzer, Fabian Consani, Cristina Koch, Federico Brixner, Tobias Baessler, Heinz Köhler, Anna |
| Copyright Year | 2015 |
| Abstract | Upon cooling a solution of poly(2-methoxy-5- (2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV), a phase transition occurs, leading to the formation of aggregates. We have studied the dynamics of singlet excitons in MEH-PPV solution below the critical temperature of the phase transition using steady-state photoluminescence measurements and pump−probe fs-spectroscopy at different temperatures. Spectral analysis indicates the coexistence of disordered chromophores with highly planarized chromophores. The high planarity is evidenced by a remarkably high 0−0/0−1 peak ratio in the spectra. By spectrally separating the contributions of either type of chromophore to the pump−probe signal we find that energy transfer takes place within less than 1 ps from disordered, unaggregated chain segments to highly planarized, aggregated chain segments. The short time scale of the energy transfer indicates intimate intermixing of the planarized and disordered polymeric chromophores. |
| Starting Page | 412 |
| Ending Page | 416 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/acsmacrolett.5b00133 |
| Alternate Webpage(s) | http://www.ep2-bayreuth.de/wp-content/uploads/2015/03/acsmacrolett.5b00133.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/acsmacrolett.5b00133 |
| Volume Number | 4 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
