%0 Journal Article %1 C7CP05168A %A Hader, Kilian %A Consani, Cristina %A Brixner, Tobias %A Engel, Volker %D 2017 %I The Royal Society of Chemistry %J Phys. Chem. Chem. Phys. %K ak-engel myown %N 47 %P 31989-31996 %R 10.1039/C7CP05168A %T Mapping of exciton-exciton annihilation in MEH-PPV by time-resolved spectroscopy: experiment and microscopic theory %U http://dx.doi.org/10.1039/C7CP05168A %V 19 %X Transient absorption traces taken on samples of the polymer MEH-PPV are measured as a function of the laser intensity. In increasing the laser power, different decay dynamics of the signal are obtained. This suggests that effective exciton-exciton annihilation takes place. The signals are interpreted using a microscopic quantum mechanical model. The analysis points at an ultrafast excitonic decay via interchain and intrachain annihilation, where the latter process is roughly thirty times slower. Afterwards, diffusion-induced annihilation and relaxation become effective and thus determine the long-time behavior of the excited-state decay.

@article{C7CP05168A, abstract = {Transient absorption traces taken on samples of the polymer MEH-PPV are measured as a function of the laser intensity. In increasing the laser power{,} different decay dynamics of the signal are obtained. This suggests that effective exciton-exciton annihilation takes place. The signals are interpreted using a microscopic quantum mechanical model. The analysis points at an ultrafast excitonic decay via interchain and intrachain annihilation{,} where the latter process is roughly thirty times slower. Afterwards{,} diffusion-induced annihilation and relaxation become effective and thus determine the long-time behavior of the excited-state decay.}, added-at = {2018-01-17T10:30:41.000+0100}, author = {Hader, Kilian and Consani, Cristina and Brixner, Tobias and Engel, Volker}, biburl = {https://www.bibsonomy.org/bibtex/20b65eb093cab28afc1083457a5e9362c/ak-engel-uniwue}, doi = {10.1039/C7CP05168A}, interhash = {7b804e85a17494cc701ebe7985e0175e}, intrahash = {0b65eb093cab28afc1083457a5e9362c}, journal = {Phys. Chem. Chem. Phys.}, keywords = {ak-engel myown}, number = 47, pages = {31989-31996}, publisher = {The Royal Society of Chemistry}, timestamp = {2018-01-17T10:30:41.000+0100}, title = {Mapping of exciton-exciton annihilation in MEH-PPV by time-resolved spectroscopy: experiment and microscopic theory}, url = {http://dx.doi.org/10.1039/C7CP05168A}, volume = 19, year = 2017 }