Photoelectrochemical and blocking properties of titania layers prepared by spray pyrolysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43915162" target="_blank" >RIV/60461373:22310/17:43915162 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.icct.cz/AngiologyKlon-ICCT/media/system/ICCT2017-full_papers.pdf" target="_blank" >http://www.icct.cz/AngiologyKlon-ICCT/media/system/ICCT2017-full_papers.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photoelectrochemical and blocking properties of titania layers prepared by spray pyrolysis

Popis výsledku v původním jazyce

For the proper function of the solar cells, a nonporous blocking film of TiO2 has to be deposited on the surface of FTO glass substrate. Such blocking film is then able to minimise an undesired parasitic process, e. g. back reaction of photoinjected electrons with the oxidized form of mediator or with the hole-transporting medium. In the present work thin transparent blocking TiO2 films were prepared by spray pyrolysis. The various layer thicknesses of sprayed films were achieved by the varying number of sprayed cycles. The investigated parameters were deposition temperature (150 - 450 °C), number of spraying cycles and subsequent calcination at 500 °C. The photoelectrochemical properties were evaluated in an inert aqueous electrolyte under UV irradiation. The blocking properties were tested by cyclic voltammmetry with a model redox probe with simple one-electron-transfer reaction. It can be concluded that the deposition temperature 450 °C is necessary for the fabrication of photoactive TiO2 films. Blocking properties were negatively influenced by post calcination at 500 °C, this negative influence can be partly compensated by an increase of number of spraying cycles, e. g. by an increase in layer thickness.

Název v anglickém jazyce

Photoelectrochemical and blocking properties of titania layers prepared by spray pyrolysis

Popis výsledku anglicky

For the proper function of the solar cells, a nonporous blocking film of TiO2 has to be deposited on the surface of FTO glass substrate. Such blocking film is then able to minimise an undesired parasitic process, e. g. back reaction of photoinjected electrons with the oxidized form of mediator or with the hole-transporting medium. In the present work thin transparent blocking TiO2 films were prepared by spray pyrolysis. The various layer thicknesses of sprayed films were achieved by the varying number of sprayed cycles. The investigated parameters were deposition temperature (150 - 450 °C), number of spraying cycles and subsequent calcination at 500 °C. The photoelectrochemical properties were evaluated in an inert aqueous electrolyte under UV irradiation. The blocking properties were tested by cyclic voltammmetry with a model redox probe with simple one-electron-transfer reaction. It can be concluded that the deposition temperature 450 °C is necessary for the fabrication of photoactive TiO2 films. Blocking properties were negatively influenced by post calcination at 500 °C, this negative influence can be partly compensated by an increase of number of spraying cycles, e. g. by an increase in layer thickness.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA17-20008S" target="_blank" >GA17-20008S: Nové fotokatodové a photoanodové materiály pro solární rozklad vody</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 5th International Conference on Chemical Technology

ISBN

978-80-86238-65-4

ISSN

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e-ISSN

2336-8128

Počet stran výsledku

5

Strana od-do

225-229

Název nakladatele

Česká společnost průmyslové chemie (ČSPCH)

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

10. 4. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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