A Stable Perovskite Sensitized Photonic Crystal P−N Junction with Enhanced Photoelectrochemical Hydrogen Production

Abstract

AbstractThe slow photon effect in inverse opal photonic crystals represents a promising approach to manipulate the interactions between light and matter through the design of material structures. This study introduces a novel ordered inverse opal photonic crystal (IOPC) sensitized with perovskite quantum dots (PQDs), demonstrating its efficacy for efficient visible‐light‐driven H2 generation via water splitting. The rational structural design contributes to enhanced light harvesting. The sensitization of the IOPC with PQDs improves optical response performance and enhances photocatalytic H2 generation under visible light irradiation compared to the IOPC alone. The designed photoanode exhibits a photocurrent density of 3.42 mA cm−2 at 1.23 V vs RHE. This work advances the rational design of visible light‐responsive photocatalytic heterostructure materials based on wide band gap metal oxides for photoelectrochemical applications.