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| Hauptseite > Publikationsdatenbank > Effects of varied illumination on the performance of solar water splitting systems and evaluation of annual hydrogen generation |
| Hauptseite > Publikationsdatenbank > Effects of varied illumination on the performance of solar water splitting systems and evaluation of annual hydrogen generation |
| Conference Presentation (Other) | FZJ-2022-00429 |
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2021
Abstract: We study the effects of simulated outdoor illumination conditions on the performance of photovoltaic-biased electrosynthetic (PV?EC) systems used for the generation of hydrogen by means of solar water splitting. An integrated PV-EC cell consists of a photovoltaic cell (PV) directly combined with an electrolysis cell (EC), where the chemical reactions take place. In the present work, multijunction silicon based solar cells [1] were implemented for the PV part of the device together with an EC cell using a Pt/IrOx catalyst system. Annual variations in the solar illumination spectra influence the device performance together with long-term energy conversion. Both PV device and PV-EC device performance under varied spectral conditions differ from the performance obtained under standard AM1.5G illumination. Our model accounts for annual spectral changes in illumination and predicts the long-term (1 year) performance of PV?EC systems in terms of the hydrogen amount produced for a given geographical location for various types of multijunction photovoltaic systems (tandem, triple, and quadruple junctions). [1] F. Urbain, V. Smirnov, J.P. Becker et al, Energy Env. Sci. 2016, 9, 145?154 [2] K. Welter et al, Energy Fuels 2021, 35, 1, 839-846
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