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- W2892314197 abstract "The open-circuit potential (Voc) represents the maximum thermodynamic potential in a device, and achieving a high Voc is crucial for self-biased photoelectrochemical (PEC) devices that use only solar energy to produce chemical energy. In general, Voc is limited by the photovoltage (Vph), which is a potential difference generated by light-induced thermodynamic processes at semiconductor photoelectrodes, such as the generation and recombination of charge carriers. Therefore, low light intensity and nanostructured semiconductor materials degrade Vph (and Voc) by inefficient carrier generation and by enhancing recombination loss, respectively. Here, we report that Voc in dynamic PEC devices employing a porous NiOx/Si photocathode is insensitive to thermodynamic losses, which was clarified by varying the carrier generation and recombination rates. The Voc values were observed to be unchanged even under a low light intensity of 0.1 sun, as well as for different morphologies such as nanostructured and polycrystalline Si. These findings shed light on the potential merit of dynamically operated PEC systems." @default.
- W2892314197 created "2018-09-27" @default.
- W2892314197 creator A5032895458 @default.
- W2892314197 creator A5048032554 @default.
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- W2892314197 date "2018-09-04" @default.
- W2892314197 modified "2023-09-24" @default.
- W2892314197 title "Dynamic Photoelectrochemical Device with Open-Circuit Potential Insensitive to Thermodynamic Voltage Loss" @default.
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- W2892314197 doi "https://doi.org/10.1021/acs.jpclett.8b02295" @default.
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