Room temperature cavity polaritons with 3D hybrid perovskite - Towards low-cost polaritonic devices

TL;DR

This paper demonstrates room-temperature cavity polaritons using 3D hybrid perovskite in a microcavity, highlighting its potential for low-cost, electrically injectable polaritonic devices due to strong exciton-photon coupling.

Contribution

It provides the first experimental demonstration of strong exciton-photon coupling with 3D hybrid perovskite at room temperature in a microcavity.

Findings

Achieved cavity polaritons at room temperature in 3D perovskite.

Measured a Rabi splitting of 70 meV.

Demonstrated a microcavity with quality factor 92.

Abstract

Hybrid halide perovskites are now considered as low-cost materials for contemporary research in photovoltaics and nanophotonics. In particular, because these materials can be solution processed, they represent a great hope for obtaining low-cost devices. While the potential of 2D layered hybrid perovskites for polaritonic devices operating at room temperature has been demonstrated in the past, the potential of the 3D perovskites has been much less explored for this particular application. Here, we report the strong exciton-photon coupling with 3D bromide hybrid perovskite. Cavity polaritons are experimentallly demonstrated from both reflectivity and photoluminescence experiments, at room temperature, in a 3$\lambda$/2 planar microcavity containing a large surface spin-coated $CH_3NH_3PbBr_3$ thin film. A microcavity quality factor of 92 was found and a large Rabi splitting of 70 meV was measured. This result paves the way to low-cost polaritonic devices operating at room temperature, potentially electrically injectable as 3D hybrid perovskites present good transport properties.