Enhancement of the Internal Quantum Efficiency in Strongly Coupled P3HT-C Organic Photovoltaic Cells Using Fabry-Perot Cavities with Varied Cavity Confinement

Overview

Journal Nanophotonics

Publisher De Gruyter

Date 2024 Jun 5

PMID 38836103

Authors

Lianne M A de Jong

Anton Matthijs Berghuis

Mohamed S Abdelkhalik

Tom P A van der Pol

Martijn M Wienk

Rene A J Janssen

Jaime Gomez Rivas

Affiliations

Soon will be listed here.

Abstract

The short exciton diffusion length in organic semiconductors results in a strong dependence of the conversion efficiency of organic photovoltaic (OPV) cells on the morphology of the donor-acceptor bulk-heterojunction blend. Strong light-matter coupling provides a way to circumvent this dependence by combining the favorable properties of light and matter via the formation of hybrid exciton-polaritons. By strongly coupling excitons in P3HT-C OPV cells to Fabry-Perot optical cavity modes, exciton-polaritons are formed with increased propagation lengths. We exploit these exciton-polaritons to enhance the internal quantum efficiency of the cells, determined from the external quantum efficiency and the absorptance. Additionally, we find a consistent decrease in the Urbach energy for the strongly coupled cells, which indicates the reduction of energetic disorder due to the delocalization of exciton-polaritons in the optical cavity.

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