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Photocurrent study of all-printed photodetectors on paper made of different transition metal dichalcogenide nanosheets

McManus, D. and Dal Santo, A. and Selvasundaram, P. B. and Krupke, R. and LiBassi, A. and Casiraghi, C. (2018):
Photocurrent study of all-printed photodetectors on paper made of different transition metal dichalcogenide nanosheets.
In: Flexible and Printed Electronics, 3 (3), pp. 034005. IOP Publishing, ISSN 2058-8585,
DOI: 10.1088/2058-8585/aaddb5,
[Article]

Abstract

We have inkjet-printed in-plane 'metal–semiconductor–metal' type photodetectors on paper, one of the cheapest flexible substrates, which is also recyclable and foldable, in contrast to traditional plastic substrates. The photodetectors are made by using graphene as electrodes and various transition metal dichalcogenides (TMDs) as photoactive component. In particular, we have tested MoS2, WS2, MoSe2 and MoTe2. Large differences in responsivity and sensitivity were observed for all of the TMDs measured, with MoS2 showing the highest sensitivity and MoTe2 producing the largest response. However, photodetectors made of MoTe2 show a large decrease in responsivity after one week of exposure to air. The wavelength dependence of the responsivity in MoS2 based devices was further analyzed using a supercontinuum photocurrent spectroscopy setup, with the results suggesting a bolometric or photoelectric origin of the signal. We also report some simple approaches to enhance the device performance and tune the energy range at which the maximum in responsivity or sensitivity is observed.

Item Type: Article
Erschienen: 2018
Creators: McManus, D. and Dal Santo, A. and Selvasundaram, P. B. and Krupke, R. and LiBassi, A. and Casiraghi, C.
Title: Photocurrent study of all-printed photodetectors on paper made of different transition metal dichalcogenide nanosheets
Language: English
Abstract:

We have inkjet-printed in-plane 'metal–semiconductor–metal' type photodetectors on paper, one of the cheapest flexible substrates, which is also recyclable and foldable, in contrast to traditional plastic substrates. The photodetectors are made by using graphene as electrodes and various transition metal dichalcogenides (TMDs) as photoactive component. In particular, we have tested MoS2, WS2, MoSe2 and MoTe2. Large differences in responsivity and sensitivity were observed for all of the TMDs measured, with MoS2 showing the highest sensitivity and MoTe2 producing the largest response. However, photodetectors made of MoTe2 show a large decrease in responsivity after one week of exposure to air. The wavelength dependence of the responsivity in MoS2 based devices was further analyzed using a supercontinuum photocurrent spectroscopy setup, with the results suggesting a bolometric or photoelectric origin of the signal. We also report some simple approaches to enhance the device performance and tune the energy range at which the maximum in responsivity or sensitivity is observed.

Journal or Publication Title: Flexible and Printed Electronics
Journal volume: 3
Number: 3
Publisher: IOP Publishing
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
Date Deposited: 20 Nov 2020 12:08
DOI: 10.1088/2058-8585/aaddb5
Official URL: https://iopscience.iop.org/article/10.1088/2058-8585/aaddb5
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