Metal Halide Perovskites for Violet and Ultraviolet Light Emission

TL;DR

This review discusses recent advances in metal halide perovskites for violet and ultraviolet light emission, addressing challenges and proposing pathways for improved stability, tunability, and scalability for various applications.

Contribution

It provides a comprehensive overview of synthesis, device fabrication, and potential solutions for developing stable, efficient violet and ultraviolet MHP light-emitting devices.

Findings

Progress in material synthesis and device fabrication techniques.

Identification of key challenges like stability and toxicity.

Potential applications in health, 3D printing, and nanofabrication.

Abstract

Emissive metal halide perovskites (MHPs) have emerged as excellent candidates for next-generation optoelectronics due to their sharp color purity, inexpensive processing, and bandgap tunability. However, the development of violet and ultraviolet light-emitting MHPs has lagged behind due to challenges related to material and device stability, charge carrier transport, tunability into the ultraviolet spectrum, toxicity, and scalability. Here, we review the progress of both violet and ultraviolet MHP nanomaterials and light-emitting diodes, including materials synthesis and device fabrication across various crystal structures and dimensions (e.g., bulk thin films, 2D thin films, nanoplatelets, colloidal nanocrystals, and more) as well as lead-free platforms (e.g., rare-earth metal halide perovskites). By highlighting several pathways to continue the development of violet and ultraviolet light-emitting MHPs while also proposing tactics to overcome their outstanding challenges, we demonstrate the potential of state-of-the-art violet and ultraviolet MHP materials and devices for important applications in public health, 3D printing, nanofabrication, and more.