# Stabilizing Ultrathin CsPbBr3 Nanoplatelet Films for Deterministic Strong Light-Matter Coupling

## TL;DR

Researchers developed a way to stabilize CsPbBr3 nanoplatelet films, enabling the formation of exciton cavity polaritons for optoelectronic applications.

## Contribution

A novel method to stabilize CsPbBr3 nanoplatelet films for deterministic strong light-matter coupling is introduced.

## Key findings

- CsPbBr3 nanoplatelet films can be stabilized using the described method.
- Exciton cavity polaritons are successfully formed in precisely designed microresonators.
- The stabilization method opens potential for broader optoelectronic device applications.

## Abstract

While the excitons in perovskite nanomaterials possess
interesting
properties central to their use in optoelectronic technologies, their
instability limits real world applicability. In this study, we describe
a method to stabilize the structures of cesium lead bromide (CsPbBr3) nanoplatelets (NPLs) in spin-casted films. We apply this
method to design, fabricate, and characterize exciton cavity polaritons
formed from these nanomaterials. These studies show that we can form
exciton cavity polaritons from CsPbBr3 in precisely designed
Fabry–Perot microresonators and suggest that the structures
of these materials can be stabilized toward their use in other solution-processed
optoelectronic devices.