Photo-Electrochemical Generation of Hydrogen with CIS Photoelectrodes

This SBIR project addresses an Air Force need for in-situ hydrogen generation to operate micro fuel cells in small, unmanned aircraft. It proposes a low cost, safe, lightweight photoelectrochemical system for onboard, real-time hydrogen production from water and sunlight. The project specifically exploits the low cost, high efficiency, and high reliability of electrodeposited CIS films and the applicant’s in-depth knowledge of CIS electrochemistry to devise the most efficient H2 generation system. The approach combines concepts from bi-photoelectrode and hybrid cell configurations to maximize the efficiency and durability of the water splitting system. Phase I R&D effort aims to identify the optimum materials, electrode configurations and process parameters for splitting water. The research will provide optimum configuration for an efficient and stable, low cost device, and directions for further improvements leading to over 10% efficient solar-to-hydrogen device with a 10-year lifetime. Its success will lead to new energy resources for the Air Force and provide energy self-sufficiency and clean air and water for the nation.