Photocorrosion at Irradiated Perovskite/Electrolyte Interfaces

Abstract

Metal−halide perovskites transformed optoelectronics research and development during the past decade. They have also gained a foothold in photocatalytic and photoelectrochemical processes recently, but their sensitivity to the most commonly applied solvents and electrolytes together with their susceptibility to photocorrosion hinders such applications. Understanding the elementary steps of photocorrosion of these materials can aid the endeavor of realizing stable devices. In this Perspective, we discuss both thermodynamic and kinetic aspects of photocorrosion processes occurring at the interface of perovskite photocatalysts and photoelectrodes with different electrolytes. We show how combined in situ and operando electrochemical techniques can reveal the underlying mechanisms. Finally, we also discuss emerging strategies to mitigate photocorrosion (such as surface protection, materials and electrolyte engineering, etc.).

Photoelectrochemistry of oxygen in rechargeable Li–O2 batteries

“…14d. 45 This is inferior to the battery cycle life, which can damage the microstructure of semiconductors and shorten the lifespan of photoinvolved batteries. Exploration of effective strategies to mitigate the photocorrosion and achieve a long lifespan will be negligible in the near future.…”

In‐Situ Generated CsPbBr3 Nanocrystals on O‐Defective WO3 for Photocatalytic CO2 Reduction

“…Metal halide perovskites (MHPs) have attracted considerable attention due to their fascinating optoelectronic properties and widespread applications in photovoltaic devices [12–14] . Benefiting from its facile processing, large extinction coefficient, high carrier mobility, and long carrier lifetime, MHPs nanocrystals (NCs) have also shown great potential in photocatalysis [15,16] .…”

“…Metal halide perovskites (MHPs) have attracted considerable attention due to their fascinating optoelectronic properties and widespread applications in photovoltaic devices. [12][13][14] Benefiting from its facile processing, large extinction coefficient, high carrier mobility, and long carrier lifetime, MHPs nanocrystals (NCs) have also shown great potential in photocatalysis. [15,16] In particular, MHPs NCs possess a relatively negative conduction band (CB) and suitable adsorption energy toward CO 2 molecule, [17,18] showing a large driving force and surface activation capability for CO 2 reduction.…”

Sacrificial Agent Gone Rogue: Electron-Acceptor-Induced Degradation of CsPbBr3 Photocathodes

“… 26 , 27 Such carrier accumulation is also responsible for inducing photocorrosion. 28 , 29 In PEC reactions, the use of sacrificial agents can prevent carrier accumulation on the electrode surface and often stabilize sensitive materials. 29 This is the underlying reason these materials are often employed to assess the ultimate performance of photoelectrodes and reveal kinetic limitations in certain PEC reactions.…”

“… 28 , 29 In PEC reactions, the use of sacrificial agents can prevent carrier accumulation on the electrode surface and often stabilize sensitive materials. 29 This is the underlying reason these materials are often employed to assess the ultimate performance of photoelectrodes and reveal kinetic limitations in certain PEC reactions. 30 , 31 This concept can be extended to redox mediators, which rapidly siphon the respective charge carrier from the electrode surface, and a potentially sluggish redox reaction takes place between the redox mediator and the substance afterward.…”