Wavelength-Tailored Photon-Assisted Catalysis: Optimizing Interfacial Dynamics for Solar Fuel Production

Abstract

Despite decades of research, achieving practical solar-to-fuel conversion efficiency in semiconductor photocatalysis remains a significant challenge. Traditional approaches have predominantly focused on material design and surface engineering, often overlooking the critical interplay between the light and semiconductor properties. This perspective proposes a paradigm shift toward holistic light management, integrating wavelength, intensity, and temporal control of illuminationto optimize charge carrier dynamics in photoelectrochemical systems. By precisely matching the photon penetration depth to the space charge layer thickness, optimizing the light intensity to maintain effective band bending, and implementing pulsed irradiation to prevent surface degradation, the photocatalytic efficiency can be significantly enhanced. Embracing this comprehensive approach can unlock the efficiency improvements necessary for practical applications in renewable energy and environmental remediation.