ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Conductivity and Photoconductivity of a p-type Organic Semiconductor under Ultra-Strong Coupling

preprint
revised on 15.06.2020 and posted on 17.06.2020 by Kalaivanan Nagarajan, Jino George, Anoop Thomas, Eloïse Devaux, Thibault Chervy, Stefano Azzini, Jouaiti Aziz, Mir Wais Hosseini, Anil Kumar, Cyriaque Genet, Nicola Bartolo, Cristiano Ciuti, Thomas Ebbesen
It has been shown that light-matter strong coupling of materials can lead to modified and often improved properties which has stimulated considerable interest. While charge transport can be enhanced in n-type organic semiconductors by coupling the electronic transition and thereby splitting the conduction band into polaritonic states, it is not clear whether the same process can also influence carrier transport in the valence band of p-type semiconductors. Here we demonstrate for the first time that it is indeed possible to enhance both the conductivity and photoconductivity of a p-type semiconductor rr-P3HT that is ultra-strongly coupled to plasmonic modes. It is due to the hybrid light-matter character of the virtual polaritonic excitations affecting the linear-response of the material. Furthermore, in addition to being enhanced, the photoconductivity of rr-P3HT shows modified spectral response due to the formation of the hybrid polaritonic states. This illustrates the potential of engineering the vacuum electromagnetic environment to improve the opto-electronic properties of organic materials.

History

Email Address of Submitting Author

ebbesen@unistra.fr

Institution

University of Strasbourg

Country

France

ORCID For Submitting Author

0000-0002-3999-1636

Declaration of Conflict of Interest

no conflict of interest

Exports