[15p-M_374-1~12] Advances in Energy Conversion Research through Photoactive Materials and Interface Engineering

2:05 PM - 2:35 PM JST(5:05 AM - 5:35 AM UTC)

[15p-M_374-3] Enhancing Water Splitting Performance by Engineering the Semiconductor Photoelectrode/Electrolyte Interface

〇Tomohiro Higashi¹ (1.Univ. of Miyazaki)

Keywords:

photoelectrodes,photoelectrochemistry,water splitting

Photoelectrochemical(PEC) water splitting efficiency is limited at the semiconductor photoelectrode/electrolyte interface, where band energetics, surface states, catalyst kinetics, and corrosion are coupled. This talk introduces an interface design strategy to enhance PEC water-splitting performance by improving charge separation and interfacial reaction selectivity simultaneously. This presentation demonstrates the roles of ultrathin (semi)transparent cocatalyst and passivation layers that suppress recombination while accelerating OER/HER. It also show how conductive/transport layers enable efficient carrier collection. Case studies on n-type photoanodes and p-type photocathodes clarify how surface states govern onset potential, photocurrent, and stability, and how controlled passivation and cocatalyst integration deliver photocurrent gains.