| Conţinutul numărului revistei |
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 878 0 |
 SM ISO690:2012GROTTRUP, Jorit, POSTICA, Vasile, SMAZNA, Daria, HOPPE, Mathias, KAIDAS, Victor, MISHRA, Yogendra Kumar, LUPAN, Oleg, ADELUNG, Rainer. UV detection properties of hybrid ZnO tetrapod 3-D networks. In: Vacuum, 2017, nr. 146, pp. 492-500. ISSN 0042-207X. DOI: https://doi.org/10.1016/j.vacuum.2017.03.017 |
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  Vacuum |
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| Numărul 146 / 2017 / ISSN 0042-207X /ISSNe 1879-2715 | ||||||
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| DOI:https://doi.org/10.1016/j.vacuum.2017.03.017 | ||||||
| Pag. 492-500 | ||||||
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Hybridization of micro- and nanostructures of semiconducting oxides is known to be an efficient way to greatly improve their sensing properties and photocatalytic activity. In this work, zinc oxide (ZnO) tetrapod (T) three-dimensional (3-D) highly porous networks were hybridized with MexOy and ZnxMe1-xOy compounds (Me = Sn, Fe, Bi, Cu or Al), and their ultraviolet (UV) sensing properties were investigated. Additionally, individual Al-doped ZnO-T (ZnO-T:Al) with different diameters were integrated into devices using a FIB/SEM system to study the influence of diameter on the UV sensing properties. ZnO-T−CuO hybrid networks demonstrated the highest increase in UV response (with about 2.5 times) and decrease in response and recovery time (τr1 = τr2 ≈ 0.03 s and τd1 = τd2 ≈ 0.045 s) compared to pristine ZnO-T networks before hybridization, which is quite promising for applications in fast optical communication. The ZnO-T−Zn2SnO4 hybrid networks showed only a slight increase in UV response while other types of hybrid networks showed a considerable decrease in UV response, especially in the case of ZnO-T−Bi2O3 hybrid networks, which could be attributed to the fast recombination of photoexcited electrons and holes in Bi2O3 under the UV light illumination. The results demonstrate that hybridization with p-type materials is more efficient due to higher photogenerated charge separation properties. In the case of individual structures the device based on a microwire with lower diameter showed higher stability and good repeatability with a relatively high UV response of about 5.5. The excellent UV sensing properties combined with ultra-low power consumption make such devices very attractive for real applications like portable UV dosimeters. This work demonstrated the high efficiency of ZnO-T hybridization with p-type metal oxides for improvement of UV sensing properties. |
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| Cuvinte-cheie Hybrid, nanosensor, UV photodetector, networks, ZnO tetrapod |
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DataCite XML Export
<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://datacite.org/schema/kernel-3' xsi:schemaLocation='http://datacite.org/schema/kernel-3 http://schema.datacite.org/meta/kernel-3/metadata.xsd'> <identifier identifierType='DOI'>10.1016/j.vacuum.2017.03.017</identifier> <creators> <creator> <creatorName>Grottrup, J.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Postica, V.</creatorName> <affiliation>Universitatea Tehnică a Moldovei, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Smazna, D.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Hoppe, M.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Kaidas, V.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Mishra, Y.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Lupan, O.I.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> <creator> <creatorName>Adelung, R.</creatorName> <affiliation>Institute for Material Science, Christian-Albrechts-University of Kiel, Germania</affiliation> </creator> </creators> <titles> <title xml:lang='en'>UV detection properties of hybrid ZnO tetrapod 3-D networks</title> </titles> <publisher>Instrumentul Bibliometric National</publisher> <publicationYear>2017</publicationYear> <relatedIdentifier relatedIdentifierType='ISSN' relationType='IsPartOf'>0042-207X</relatedIdentifier> <subjects> <subject>Hybrid</subject> <subject>nanosensor</subject> <subject>networks</subject> <subject>UV photodetector</subject> <subject>ZnO tetrapod</subject> </subjects> <dates> <date dateType='Issued'>2017-12-05</date> </dates> <resourceType resourceTypeGeneral='Text'>Journal article</resourceType> <descriptions> <description xml:lang='en' descriptionType='Abstract'><p>Hybridization of micro- and nanostructures of semiconducting oxides is known to be an efficient way to greatly improve their sensing properties and photocatalytic activity. In this work, zinc oxide (ZnO) tetrapod (T) three-dimensional (3-D) highly porous networks were hybridized with Me<sub>x</sub>O<sub>y</sub> and Zn<sub>x</sub>Me<sub>1-x</sub>O<sub>y</sub> compounds (Me = Sn, Fe, Bi, Cu or Al), and their ultraviolet (UV) sensing properties were investigated. Additionally, individual Al-doped ZnO-T (ZnO-T:Al) with different diameters were integrated into devices using a FIB/SEM system to study the influence of diameter on the UV sensing properties. ZnO-T−CuO hybrid networks demonstrated the highest increase in UV response (with about 2.5 times) and decrease in response and recovery time (τ<sub>r1</sub> = τ<sub>r2</sub> ≈ 0.03 s and τ<sub>d1</sub> = τ<sub>d2</sub> ≈ 0.045 s) compared to pristine ZnO-T networks before hybridization, which is quite promising for applications in fast optical communication. The ZnO-T−Zn<sub>2</sub>SnO<sub>4</sub> hybrid networks showed only a slight increase in UV response while other types of hybrid networks showed a considerable decrease in UV response, especially in the case of ZnO-T−Bi<sub>2</sub>O<sub>3</sub> hybrid networks, which could be attributed to the fast recombination of photoexcited electrons and holes in Bi<sub>2</sub>O<sub>3</sub> under the UV light illumination. The results demonstrate that hybridization with p-type materials is more efficient due to higher photogenerated charge separation properties. In the case of individual structures the device based on a microwire with lower diameter showed higher stability and good repeatability with a relatively high UV response of about 5.5. The excellent UV sensing properties combined with ultra-low power consumption make such devices very attractive for real applications like portable UV dosimeters. This work demonstrated the high efficiency of ZnO-T hybridization with p-type metal oxides for improvement of UV sensing properties.</p></description> </descriptions> <formats> <format>uri</format> </formats> </resource>
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