Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

Harri Ali-Löytty; Markku Hannula; Jesse Saari; Lauri Palmolahti; Bela D. Bhuskute; Riina Ulkuniemi; Tuomo Nyyssönen; Kimmo Lahtonen; Mika Valden

doi:10.1021/acsami.8b20608

Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

Harri Ali-Löytty, Markku Hannula, Jesse Saari, Lauri Palmolahti, Bela D. Bhuskute, Riina Ulkuniemi, Tuomo Nyyssönen, Kimmo Lahtonen, Mika Valden

Tutkimustuotos: Artikkeli › Scientific › vertaisarvioitu

13 Sitaatiot (Scopus)

80 Lataukset (Pure)

Abstrakti

Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.

Alkuperäiskieli	Englanti
Sivut	2758–2762
Sivumäärä	5
Julkaisu	ACS Applied Materials & Interfaces
Vuosikerta	11
Numero	3
DOI - pysyväislinkit	https://doi.org/10.1021/acsami.8b20608
Tila	Julkaistu - 4 tammik. 2019
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1021/acsami.8b20608Lisenssi: CC BY

acsami.8b20608
With CC-BY license https://creativecommons.org/licenses/by/4.0/
Final published version, 3,39 MB

http://urn.fi/URN:NBN:fi:tty-201906281916Lisenssi: CC BY

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title = "Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2",

abstract = "Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.",

author = "Harri Ali-L{\"o}ytty and Markku Hannula and Jesse Saari and Lauri Palmolahti and Bhuskute, {Bela D.} and Riina Ulkuniemi and Tuomo Nyyss{\"o}nen and Kimmo Lahtonen and Mika Valden",

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year = "2019",

month = jan,

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doi = "10.1021/acsami.8b20608",

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journal = "ACS Applied Materials & Interfaces",

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TY - JOUR

T1 - Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

AU - Ali-Löytty, Harri

AU - Hannula, Markku

AU - Saari, Jesse

AU - Palmolahti, Lauri

AU - Bhuskute, Bela D.

AU - Ulkuniemi, Riina

AU - Nyyssönen, Tuomo

AU - Lahtonen, Kimmo

AU - Valden, Mika

N1 - INT=phys,"Ulkuniemi, Riina"

PY - 2019/1/4

Y1 - 2019/1/4

N2 - Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.

AB - Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.

U2 - 10.1021/acsami.8b20608

DO - 10.1021/acsami.8b20608

M3 - Article

VL - 11

SP - 2758

EP - 2762

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

SN - 1944-8244

IS - 3

ER -

Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

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