Abstract
A wide bandgap polymer is used in homo-tandem solar cells for light-driven electrochemical water splitting with a solar-to-hydrogen efficiency of 4.3%.
Highlights
Electrochemical water splitting occurs at a standard potential of 1.23 V but in practice substantially higher potentials (1.4 to 1.8 V) are required due to overpotentials for the hydrogen and oxygen evolution reactions
In combination with RuO2 as the electrocatalyst for oxygen evolution and RuO2 or Pt catalysts for hydrogen evolution, sunlight-driven electrochemical water splitting occurs with a solar-to-hydrogen conversion efficiency of high solar-to-hydrogen energy conversion efficiency (hSTH) 1⁄4 4.3%
Sunlight-driven electrochemical water splitting devices use multi-junction cell con gurations in which two or more photovoltaic cells are stacked and connected in series to reach the high potential while still using an appreciable part of the solar spectrum
Summary
Electrochemical water splitting occurs at a standard potential of 1.23 V but in practice substantially higher potentials (1.4 to 1.8 V) are required due to overpotentials for the hydrogen and oxygen evolution reactions. Optimized light-driven electrochemical water splitting with tandem polymer solar cells† Tandem polymer solar cells are used for light-driven electrochemical water splitting.
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