Universität zu Köln

Sasinska, Alexander, Singh, Trilok ORCID: 0000-0003-2322-7403, Wang, Shuangzhou, Mathur, Sanjay and Kraehnert, Ralph ORCID: 0000-0002-6159-9585 (2015). Enhanced photocatalytic performance in atomic layer deposition grown TiO2 thin films via hydrogen plasma treatment. J. Vac. Sci. Technol. A, 33 (1). MELVILLE: A V S AMER INST PHYSICS. ISSN 1520-8559

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Abstract

The authors report the effect of hydrogen plasma treatment on TiO2 thin films grown by atomic layer deposition as an effective approach for modifying the photoanode materials in order to enhance their photoelectrochemical performance. Hydrogen plasma treated TiO2 thin films showed an improved absorption in the visible spectrum probably due to surface reduction. XPS analysis confirmed the formation of Ti3+ states upon plasma treatment. Hydrogen plasma treatment of TiO2 films enhanced the measured photocurrent densities by a factor of 8 (1 mA/cm(2) at 0.8 V versus normal hydrogen electrode) when compared to untreated TiO2 (0.12 mA/cm(2)). The enhancement in photocurrent is attributed to the formation of localized electronic states in mid band-gap region, which facilitate efficient separation and transportation of photo excited charge carriers in the UV region of electromagnetic spectrum. (C) 2014 American Vacuum Society.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sasinska, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Singh, Trilok UNSPECIFIED orcid.org/0000-0003-2322-7403 UNSPECIFIED Wang, Shuangzhou UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Kraehnert, Ralph UNSPECIFIED orcid.org/0000-0002-6159-9585 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-416491
DOI:	10.1116/1.4904503
Journal or Publication Title:	J. Vac. Sci. Technol. A
Volume:	33
Number:	1
Date:	2015
Publisher:	A V S AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1520-8559
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NANOWIRE ARRAYS; BLACK TIO2; STRUCTURAL-PROPERTIES; WATER; NANOCRYSTALS; ABSORPTION; CVD Multiple languages Materials Science, Coatings & Films; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/41649