Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films
Defect‐rich black titanium dioxide (B‐TiO2) has been extensively studied over the past decade due to its enhanced photoelectrochemical efficiency compared to titanium dioxide (TiO2), which is known for its outstanding photocatalytic stability. So far, most of the B‐TiO2 material is obtained by hydro...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-10-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202300163 |
| _version_ | 1797665921884487680 |
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| author | Dennis Berends Dereje H. Taffa Hosni Meddeb Patrick Schwager Kai Gehrke Martin Vehse Carsten Agert |
| author_facet | Dennis Berends Dereje H. Taffa Hosni Meddeb Patrick Schwager Kai Gehrke Martin Vehse Carsten Agert |
| author_sort | Dennis Berends |
| collection | DOAJ |
| description | Defect‐rich black titanium dioxide (B‐TiO2) has been extensively studied over the past decade due to its enhanced photoelectrochemical efficiency compared to titanium dioxide (TiO2), which is known for its outstanding photocatalytic stability. So far, most of the B‐TiO2 material is obtained by hydrogenation of crystalline TiO2, resulting in a disordered outer layer of a few nanometers thickness. Recently, a new sputtering process has been introduced to produce B‐TiO2 thin films without the usage of hydrogen. Herein, the influence of the sputtering process on the creation of Ti3+ defect states within the films is discussed. Comprehensive optical, structural, and electronic studies of the thin film suggest that increasing the density of Ti3+ states enhances the conductivity of the films and results in increased and broadband light absorption. In addition, the new sputtering method can also be used to alter the density of the defect states in the film in a controlled manner, allowing the optical and electronical properties of the thin film to be changed in a precise and controllable way. |
| first_indexed | 2024-03-11T19:51:05Z |
| format | Article |
| id | doaj.art-239db444503847beabafe75ba5d0047c |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-03-11T19:51:05Z |
| publishDate | 2023-10-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-239db444503847beabafe75ba5d0047c2023-10-05T07:17:20ZengWiley-VCHAdvanced Photonics Research2699-92932023-10-01410n/an/a10.1002/adpr.202300163Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin FilmsDennis Berends0Dereje H. Taffa1Hosni Meddeb2Patrick Schwager3Kai Gehrke4Martin Vehse5Carsten Agert6Urban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyChemical Technology 1 Institute of Chemistry Carl von Ossietzky Universität Oldenburg 26129 Oldenburg GermanyUrban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyUrban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyUrban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyUrban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyUrban and Residential Technologies DLR Institute of Networked Energy Systems 26129 Oldenburg GermanyDefect‐rich black titanium dioxide (B‐TiO2) has been extensively studied over the past decade due to its enhanced photoelectrochemical efficiency compared to titanium dioxide (TiO2), which is known for its outstanding photocatalytic stability. So far, most of the B‐TiO2 material is obtained by hydrogenation of crystalline TiO2, resulting in a disordered outer layer of a few nanometers thickness. Recently, a new sputtering process has been introduced to produce B‐TiO2 thin films without the usage of hydrogen. Herein, the influence of the sputtering process on the creation of Ti3+ defect states within the films is discussed. Comprehensive optical, structural, and electronic studies of the thin film suggest that increasing the density of Ti3+ states enhances the conductivity of the films and results in increased and broadband light absorption. In addition, the new sputtering method can also be used to alter the density of the defect states in the film in a controlled manner, allowing the optical and electronical properties of the thin film to be changed in a precise and controllable way.https://doi.org/10.1002/adpr.202300163bipolar sputtering of thin filmsblack titanium dioxideoptical modeling |
| spellingShingle | Dennis Berends Dereje H. Taffa Hosni Meddeb Patrick Schwager Kai Gehrke Martin Vehse Carsten Agert Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films Advanced Photonics Research bipolar sputtering of thin films black titanium dioxide optical modeling |
| title | Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films |
| title_full | Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films |
| title_fullStr | Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films |
| title_full_unstemmed | Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films |
| title_short | Precise Control of Broadband Light Absorption and Density of Ti3+ States in Sputtered Black TiO2 Thin Films |
| title_sort | precise control of broadband light absorption and density of ti3 states in sputtered black tio2 thin films |
| topic | bipolar sputtering of thin films black titanium dioxide optical modeling |
| url | https://doi.org/10.1002/adpr.202300163 |
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