Impact of the glass transition on exciton dynamics in polymer thin films

Ehrenreich, P.; Pröpper, D.; Graf, A.; Jores, S.; Boris, A.; Schmidt-Mende, L.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Impact of the glass transition on exciton dynamics in polymer thin films

MPS-Authors

/persons/resource/persons279802

Boris, A.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Ehrenreich, P., Pröpper, D., Graf, A., Jores, S., Boris, A., & Schmidt-Mende, L. (2017). Impact of the glass transition on exciton dynamics in polymer thin films. Physical Review B, 96(19): 195204.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D188-C

Abstract

In the development of organic electronics, unlimited design possibilities of conjugated polymers offer a wide variety of mechanical and electronic properties. Thereby, it is crucially important to reveal universal physical characteristics that allow efficient and forward developments of new chemical compounds. In particular for organic solar cells, a deeper understanding of exciton dynamics in polymer films can help to improve the charge generation process further. For this purpose, poly(3-hexylthiophene) (P3HT) is commonly used as a model system, although exciton decay kinetics have found different interpretations. Using temperature-dependent time-resolved photoluminescence spectroscopy in combination with low-temperature spectroscopic ellipsometry, we can show that P3HT is indeed a model system in which excitons follow a simple diffusion/hopping model. Based on our results we can exclude the relevance of hot-exciton emission as well as a dynamic torsional relaxation upon photoexcitation on a ps time scale. Instead, we depict the glass transition temperature of polymers to strongly affect exciton dynamics.