000884788 001__ 884788
000884788 005__ 20240712084453.0
000884788 0247_ $$2Handle$$a2128/26952
000884788 0247_ $$2ISSN$$a1866-1793
000884788 020__ $$a978-3-95806-495-9
000884788 037__ $$aFZJ-2020-03250
000884788 041__ $$aEnglish
000884788 1001_ $$0P:(DE-Juel1)167359$$aWelter, Katharina$$b0$$eCorresponding author$$gfemale$$ufzj
000884788 245__ $$aSolar driven water electrolysis based on silicon solar cells and earth-abundant catalysts$$f- 2020
000884788 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2020
000884788 300__ $$aiv, 165 S.
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000884788 3367_ $$2ORCID$$aDISSERTATION
000884788 3367_ $$2BibTeX$$aPHDTHESIS
000884788 3367_ $$02$$2EndNote$$aThesis
000884788 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1611339353_30306
000884788 3367_ $$2DRIVER$$adoctoralThesis
000884788 4900_ $$aSchriften des Forschungszentrums Jülich. Reihe Energie & Umwelt / Energy & Environment$$v508
000884788 502__ $$aTU Darmstadt, Diss., 2020$$bDr.$$cTU Darmstadt$$d2020
000884788 520__ $$aIn the present work “proof of concept” upscaling steps were taken for a PV-EC device of 100 cm$^{2}$ substrate size. The active thin film silicon solar cell area was increased to 64 cm$^{2}$, while earth-abundant nickel based catalysts were scaled up by a factor of 100 to electrode areas of 50.3 cm$^{2}$. Implementing the thin film siliconsolar cell into the PV-EC device in combination with the earth-abundant catalysts yielded a solar-to-hydrogen efficiency of 5.1 %, which is significantly improved compared to a PV-EC device based on nickel electrodes. It is shown that noble metal catalysts can be replaced by earth-abundant materials without performance losses. The long-term stable operation of the scaled up PV-EC devices is ensured by the use of metal sheet electrodes serving as substrate for the catalyst deposition. Regarding the catalyst stability, an excellent performance over 4 days under day-night-cycling was found for the earth-abundant nickel based system. Furthermore, the characterization of integrated PV-EC devices was expanded to illumination conditions similar to those obtained outdoors. All components used in water splitting devices are usually optimized under standard test conditions in the laboratory, which only represent one set of a wide range of possible outdoor operating conditions. For a combined PV-EC system the generation of hydrogen will only occur for output voltages above a certain value (thermodynamic potential + overpotential losses). This means, any illumination conditions shifting the illuminated current-voltage curve of the coupled system such that the voltage at the operating point is too low, will switch the system off. The influence of the operating temperature has been investigated prior to the present work, but studies concerning other possible illumination conditions were missing and therefore investigated in the present work. Additionally, a first estimation of the annual hydrogen output is given to compare devices based on different multi-junction cells and employing different catalyst systems for spectral data reported in literature.
000884788 536__ $$0G:(DE-HGF)POF3-121$$a121 - Solar cells of the next generation (POF3-121)$$cPOF3-121$$fPOF III$$x0
000884788 8564_ $$uhttps://juser.fz-juelich.de/record/884788/files/Energie_Umwelt_508.pdf$$yOpenAccess
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000884788 9141_ $$y2020
000884788 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)167359$$aForschungszentrum Jülich$$b0$$kFZJ
000884788 9131_ $$0G:(DE-HGF)POF3-121$$1G:(DE-HGF)POF3-120$$2G:(DE-HGF)POF3-100$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lErneuerbare Energien$$vSolar cells of the next generation$$x0
000884788 920__ $$lyes
000884788 9201_ $$0I:(DE-Juel1)IEK-5-20101013$$kIEK-5$$lPhotovoltaik$$x0
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