Tunable Band-Selective UV-Photodetectors by 3D Self-Assembly of Heterogeneous Nanoparticle Networks

Nasiri, N; Bo, R; Hung, TF; Roy, VAL; Fu, L; Tricoli, A

Tunable Band-Selective UV-Photodetectors by 3D Self-Assembly of Heterogeneous Nanoparticle Networks

Nasiri, N

Bo, R Hung, TF Roy, VAL Fu, L Tricoli, A

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Publication Type:: Journal Article
Citation:: Advanced Functional Materials, 2016, 26 (40), pp. 7359 - 7366
Issue Date:: 2016-10-25

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Field	Value	Language
dc.contributor.author	Nasiri, N https://orcid.org/0000-0003-4738-098X	en_US
dc.contributor.author	Bo, R	en_US
dc.contributor.author	Hung, TF	en_US
dc.contributor.author	Roy, VAL	en_US
dc.contributor.author	Fu, L	en_US
dc.contributor.author	Tricoli, A	en_US
dc.date.issued	2016-10-25	en_US
dc.identifier.citation	Advanced Functional Materials, 2016, 26 (40), pp. 7359 - 7366	en_US
dc.identifier.issn	1616-301X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122877
dc.description.abstract	© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Accurate detection of ultraviolet radiation is critical to many technologies including wearable devices for skin cancer prevention, optical communication systems, and missile launch detection. Here, a nanoscale architecture is presented for band-selective UV-photodetectors, which features unique tunability and miniaturization potential. The device layout relies on the 3D integration of ultraporous layers of tailored nanoparticles. By tailoring the transmittance window between the indirect band gap of TiO2 nanoparticles and the sharp edge of the direct band gap of ZnO, a band-selective photoresponse is achieved with tunable bandwidth to less than 30 nm and photo- to dark-current ratios of several millions at a light intensity of 86 μW cm−2 and operation bias of 1 V. The potential of this integrated morphology is shown by fabrication of the first inherent UVA photodetector with selectivity against the edge of the UVB and visible light of nearly 60 times. This tunable architecture and nanofabrication approach are compatible with state-of-the micromachining technologies and provide a flexible solution for the engineering of wearable band-selective photodetectors.	en_US
dc.relation.ispartof	Advanced Functional Materials	en_US
dc.relation.isbasedon	10.1002/adfm.201602195	en_US
dc.subject.classification	Materials	en_US
dc.title	Tunable Band-Selective UV-Photodetectors by 3D Self-Assembly of Heterogeneous Nanoparticle Networks	en_US
dc.type	Journal Article
utslib.citation.volume	40	en_US
utslib.citation.volume	26	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
utslib.for	02 Physical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	40	en_US
pubs.publication-status	Published	en_US
pubs.volume	26	en_US

Abstract:

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Accurate detection of ultraviolet radiation is critical to many technologies including wearable devices for skin cancer prevention, optical communication systems, and missile launch detection. Here, a nanoscale architecture is presented for band-selective UV-photodetectors, which features unique tunability and miniaturization potential. The device layout relies on the 3D integration of ultraporous layers of tailored nanoparticles. By tailoring the transmittance window between the indirect band gap of TiO2 nanoparticles and the sharp edge of the direct band gap of ZnO, a band-selective photoresponse is achieved with tunable bandwidth to less than 30 nm and photo- to dark-current ratios of several millions at a light intensity of 86 μW cm−2 and operation bias of 1 V. The potential of this integrated morphology is shown by fabrication of the first inherent UVA photodetector with selectivity against the edge of the UVB and visible light of nearly 60 times. This tunable architecture and nanofabrication approach are compatible with state-of-the micromachining technologies and provide a flexible solution for the engineering of wearable band-selective photodetectors.

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http://hdl.handle.net/10453/122877