Photoelectrochemical Interfaces
Our group is committed to a knowledge-based approach to photoelectrochemical interface design. Our research program strategically integrates novel thin-film photoelectrode materials based on oxynitrides, transparent catalyst layers, and electrolytes. The methodology employed includes the creation of systematic material libraries, advanced spectroscopy methods under reaction conditions, and theoretical modeling. Ultimately, we aim to seamlessly incorporate photoelectrode-catalyst couplings into tandem systems for water splitting and CO2 reduction, utilizing sunlight as the exclusive energy source.
The efficient transfer of charges across heterogeneous interfaces is critical for sustainable and renewable energy conversion processes. Whether it is generating hydrogen from water splitting or producing carbon-based fuels through CO2 reduction, these reactions demand orchestrated multi-charge transfers across solid|liquid interfaces characterized by generally sluggish reaction kinetics. In photoelectrochemical energy conversion, where sunlight is harnessed to produce fuels, the challenges extend beyond inefficient light absorption, charge recombination, and material instabilities. They also encompass hindered charge transfer due to unfavorable surface chemistries and non-ideal alignments of relevant energy levels.