 Photoelectrochemical cell

A photoelectrochemical cell (PEC) is a device that converts light energy, typically from the sun, into chemical energy through electrochemical processes. These cells combine the principles of photovoltaics and electrolysis to facilitate chemical reactions, often utilized for applications such as solar fuel production, including hydrogen generation through water splitting. Here’s how a typical PEC works: 1. **Light Absorption**: The PEC contains a photoactive material (often a semiconducting material) that absorbs sunlight.