Shining Light on Photoluminescence Properties of Metal Halide Perovskites

TL;DR

This review explores the photoluminescence properties of lead halide perovskites, emphasizing their potential in optoelectronic devices and the need for standardized characterization methods to enhance research consistency.

Contribution

It provides a comprehensive assessment of current understanding and highlights key areas for future research in the photoluminescence of metal halide perovskites.

Findings

Perovskites exhibit high-quality PL similar to pure inorganic crystals.

Standardization of PL measurement methods is urgently needed.

Understanding PL mechanisms is crucial for device optimization.

Abstract

Lead halide perovskites are a remarkable class of materials that have emerged over the past decade as being suitable for application in a broad range of devices, such as solar cells, light-emitting diodes, lasers, transistors, and memory devices, among others. While they are often solution-processed semiconductors deposited at low temperatures, perovskites exhibit properties one would only expect from highly pure inorganic crystals that are grown at high temperatures. This unique phenomenon has resulted in fast-paced progress toward record device performance; unfortunately, the basic science behind the remarkable nature of these materials is still not well understood. This review assesses the current understanding of the photoluminescence (PL) properties of metal halide perovskite materials and highlights key areas that require further research. Furthermore, the need to standardize the methods for characterization of PL in order to improve comparability, reliability and reproducibility of results is emphasized.