TiO2 Nanotube/Chalcogenide-Based Photoelectrochemical Cell: Nanotube Diameter Dependence Study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911171" target="_blank" >RIV/00216275:25310/17:39911171 - isvavai.cz</a>

Result on the web

<a href="https://pubs.acs.org/doi/10.1021/acs.jpcc.6b11283" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpcc.6b11283</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b11283" target="_blank" >10.1021/acs.jpcc.6b11283</a>

Result language

angličtina

Original language name

TiO2 Nanotube/Chalcogenide-Based Photoelectrochemical Cell: Nanotube Diameter Dependence Study

Original language description

We present photoelectrochemical results for anodic TiO2 nanotube layers grown with different diameter sizes (21, 35, 56, and 95 nm) with a thickness of approximately 560 nm using a novel anodization protocol. These tube layers were utilized as highly ordered n-type conductive scaffold for the inorganic chromophore Sn-S-Se. While downscaling the nanotube diameter significantly increased the number of nanotubes per square unit (from 5.6 x 10(9) to 7.2 x 10(10) pcs/cm(2)) and thus the active surface area increased as well, we found that the photoelectrochemical response in the UV light was identical and thus independent of the TiO2 nanotube diameter in the range of nanotube diameters from 35 to 95 nm. Further, we demonstrate that a heterostructured photoelectrochemical cell consisting of TiO2 nanotubes sensitized with crystalline Sn-S-Se chromophore showed higher photocurrent density (from 6 to 32 mu A/cm(2) for the wavelength of 460 nm) with increasing nanotube diameter size. Upon detailed SEM analyses it was revealed that Sn-S-Se was infilled in all nanotube layers approximately to one-third of the thickness. Therefore, this photocurrent increase with increasing tube diameter can be ascribed to better interfacial contact (and improved charge transport) facilitated between the chromophore and nanotube walls.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

<a href="/en/project/LM2015082" target="_blank" >LM2015082: Center of Materials and Nanotechnologies</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Volume of the periodical

121

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

6065-6071

UT code for WoS article

000397546300025

EID of the result in the Scopus database

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