Electrically pumped polarized exciton-polaritons in a halide perovskite microcavity

TL;DR

This paper reports the first electrically pumped polarized exciton-polariton device using a halide perovskite microcavity, demonstrating a new approach for practical polaritonic light-emitting applications at room temperature.

Contribution

It introduces a novel device design combining a CsPbBr3 microcavity with electrical injection, enabling electrically pumped polariton emission in perovskites for the first time.

Findings

First demonstration of electrically pumped perovskite polariton device

Polarization-selective emission due to optical birefringence

Potential for high-speed, practical polaritonic devices

Abstract

Exciton polaritons, hybrid quasiparticles with part-light part-matter nature in semiconductor microcavities, are extensively investigated for striking phenomena such as polariton condensation and quantum emulation. These phenomena have recently been discovered in emerging lead halide perovskites at elevated temperatures up to room temperature. For advancing these discoveries into practical applications, one critical requirement is the realization of electrically pumped exciton-polaritons. However, electrically pumped polariton light-emitting devices with perovskites have not yet been achieved experimentally. Here, we devise a new method to combine the device with the microcavity and report the first halide perovskite polariton light-emitting device. Specifically, the device is based on a CsPbBr3 capacitive structure, which can inject the electrons and holes from the same electrode, conducive to the formation of excitons and simultaneously maintaining the high quality of the microcavity. In addition, highly polarization-selective polariton emissions have been demonstrated due to the optical birefringence in the CsPbBr3 microplate. This work paves the way for realizing practical polaritonic devices such as high-speed light-emitting devices for information communications and inversionless electrically pumped lasers based on perovskites.