Thermoelectric-Photoelectrochemical Water Splitting under Concentrated Solar Irradiation.

ABSTRACT: Photoelectrochemical devices could play a crucial role toward fuel production in a circular economy. Yet, light absorption suffers losses from thermalization and the inability to use low-energy photons. Here, we demonstrate that photoelectrochemical reactors can utilize this waste heat by integrating thermoelectric modules, which provide additional voltage under concentrated light irradiation. While most single semiconductors require external bias, we already accomplish unassisted water splitting under 2 sun irradiation by wiring a BiVO₄ photoanode to a thermoelectric element, whereas the photocurrent of a perovskite-BiVO₄ tandem system is enhanced 1.7-fold at 5 sun. This strategy is particularly suitable for photoanodes with more positive onset potentials like hemati

SUBMITTER: Pornrungroj C 

PROVIDER: S-EPMC10311528 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature