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Semi-automatic spray pyrolysis deposition of thin, transparent, titania films as blocking layers for dye-sensitized and perovskite solar cells
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SYSNO ASEP 0488906 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Semi-automatic spray pyrolysis deposition of thin, transparent, titania films as blocking layers for dye-sensitized and perovskite solar cells Tvůrce(i) Krýsová, Hana (UFCH-W) RID, ORCID
Krýsa, J. (CZ)
Kavan, Ladislav (UFCH-W) RID, ORCIDZdroj.dok. Beilstein Journal of Nanotechnology. - : Beilstein - Institut zur Foerderung der Chemischen Wissenschaften - ISSN 2190-4286
Roč. 9, APR 2018 (2018), s. 1135-1145Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova blocking films ; FTO ; solar cells Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) CEP GA17-20008S GA ČR - Grantová agentura ČR GA18-08959s GA ČR - Grantová agentura ČR EF16_013/0001821 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000430355700001 EID SCOPUS 85046632541 DOI 10.3762/bjnano.9.105 Anotace For proper function of the negative electrode of dye-sensitized and perovskite solar cells, the deposition of a nonporous blocking film is required on the surface of F-doped SnO2 (FTO) glass substrates. Such a blocking film can minimise undesirable parasitic processes, for example, the back reaction of photoinjected electrons with the oxidized form of the redox mediator or with the hole-transporting medium can be avoided. In the present work, thin, transparent, blocking TiO2 films are prepared by semi-automatic spray pyrolysis of precursors consisting of titanium diisopropoxide bis(acetylacetonate) as the main component. The variation in the layer thickness of the sprayed films is achieved by varying the number of spray cycles. The parameters investigated in this work were deposition temperature (150, 300 and 450 °C), number of spray cycles (20–200), precursor composition (with/without deliberately added acetylacetone), concentration (0.05 and 0.2 M) and subsequent post-calcination at 500 °C. The photo-electrochemical properties were evaluated in aqueous electrolyte solution under UV irradiation. The blocking properties were tested by cyclic voltammetry with a model redox probe with a simple one-electron-transfer reaction. Semi-automatic spraying resulted in the formation of transparent, homogeneous, TiO2 films, and the technique allows for easy upscaling to large electrode areas. The deposition temperature of 450 °C was necessary for the fabrication of highly photoactive TiO2 films. The blocking properties of the as-deposited TiO2 films (at 450 °C) were impaired by post-calcination at 500 °C, but this problem could be addressed by increasing the number of spray cycles. The modification of the precursor by adding acetylacetone resulted in the fabrication of TiO2 films exhibiting perfect blocking properties that were not influenced by post-calcination. These results will surely find use in the fabrication of large-scale dye-sensitized and perovskite solar cells. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2019
Počet záznamů: 1