Enhancing photoelectrochemical CO₂ reduction with silicon photonic crystals.

ABSTRACT: The effectiveness of silicon (Si) and silicon-based materials in catalyzing photoelectrochemistry (PEC) CO₂ reduction is limited by poor visible light absorption. In this study, we prepared two-dimensional (2D) silicon-based photonic crystals (SiPCs) with circular dielectric pillars arranged in a square array to amplify the absorption of light within the wavelength of approximately 450 nm. By investigating five sets of n + p SiPCs with varying dielectric pillar sizes and periodicity while maintaining consistent filling ratios, our findings showed improved photocurrent densities and a notable shift in product selectivity towards CH₄ (around 25% Faradaic Efficiency). Additionally, we integrated platinum nanoparticles, which further enhanced the photocurrent without impa

SUBMITTER: Zhou C 

PROVIDER: S-EPMC10758474 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature