Improving the Stability of Halide Perovskites for Photo‐, Electro‐, Photoelectro‐Chemical Applications

Abstract

Owing to their remarkable and adjustable optoelectronic properties, halide perovskites (HPs) have been regarded as a class of promising materials for various optoelectronic applications based on different energy conversion reactions, including photovoltaic cell, photocatalysis, electrocatalysis, and photoelectrochemical (PEC) systems. However, the low stability of HPs upon exposure to ambient conditions (e.g., water, heat, light, electricity) greatly hinders the practical applications of HPs. In the past few years, significant efforts have been devoted to enhancing the eventual stability of the perovskite‐based optoelectronic systems, mainly focusing on delivering improvements in the stabilities of halide perovskite materials and the relevant operation conditions of optoelectronic systems, which deserve in‐depth and systematic summaries. In this comprehensive review, the in‐depth environment‐induced decomposition mechanisms of typical HPs are elucidated. Simultaneously, the strategies for addressing the instability issues of halide perovskite materials are critically reviewed, including dimension control, compositional engineering, ligand passivation, and encapsulation engineering. Furthermore, the photoelectric applications based on the modified HPs and operation conditions are discussed systematically. In the last part of this review, future perspectives and outlooks toward the stability of HPs and their photoelectric applications are envisaged respectively.

Enhancing Performance and Stability of p-i-n Perovskite Solar Cells with Ag–Cu Codeposited Alloy Electrodes

“…Perovskite solar cells (PSCs) have emerged as a leading direction in future clean energy production due to their excellent photovoltaic performance, low-temperature and environmentally friendly preparation methods, and cost-effective raw materials. , After years of extensive research and development, the photoelectric performance of PSCs has made significant strides, achieving an impressive conversion efficiency of 26.14%. , Enhancement of stability is an indispensable aspect for the commercialization of perovskite solar cells. , Factors such as oxygen, moisture, and heat lead to the degradation of perovskite and have been the focal points of research in recent years. − Additionally, there is growing attention toward the mechanism of decreased stability in the perovskite solar cells due to ion migration between the electrode and the perovskite. , …”

Methylamine Gas Sensor Based on Fluorescent Perovskite Nanocrystal Nanofibers Incorporating Aggregation-Induced Emission Materials

“…These increases were relative to the same baseline value. Fu 27 and Du 28 have explained that the decomposition of pure perovskite materials under high humidity conditions limits their long-term reliability. Therefore, blending perovskite materials with other substances is a proven strategy to enhance both the stability and the fluorescence sensitivity of perovskites.…”

Self-Trapped Exciton Emission Enhancement in 3D Cationic Lead Halide Hybrids Via Phase Transition Engineering

“…Lead halide hybrid materials have attracted tremendous attention in the field of solid-state lighting, attributable to their excellent photoelectric properties and structural tunability. − One classical and extensively studied paradigm is organic lead halide perovskite with the common formula of APbX 3 (A = organic cations, X = Cl – /Br – /I – ). − By altering the organic constituents of the hybrid materials, the corner-sharing inorganic PbX 6 octahedra units can be expanded to form one-dimensional chains, two-dimensional layers, and three-dimensional (3D) networks, resulting in significant adjustments to their optical properties. − Among them, the development of lead halide hybrids with stable and single-component broadband emission is a current research focus. − However, the majority of organic lead halide hybrids exhibit labile structures based on the weak electrostatic interactions between organic cations and inorganic framework. , Simultaneously, the hydrophilicity of most organic ions makes lead halide hybrids corroded by ambient moisture, leading to the dissociation or migration of inorganic structural units and restricting their applications. − To improve the stability of lead halide hybrids, a viable strategy is to substitute organic ions with Cs + or Rb + ions to form all-inorganic structures. , Nevertheless, this substitution inevitably sacrifices structural tunability, resulting in a limited luminous range and making it difficult to achieve broadband emission.…”