Plasmonic Photoresistor Based on Interconnected Metal‐Semiconductor Grating
Abstract: Metal‐semiconductor nanostructures in various configurations are extensively used in photodetection, photocatalysis, and photovoltaics. For photodetection purposes, the working principle is straightforward; on illumination, generated charge carriers in excess lead to a decrease in resistance. Notably, using an interconnected metal‐semiconductor grating, it is observed and now reported an opposite response, an increase in the resistance. Such photoresistors are fabricated through wrinkle structuring and oblique angle material deposition methods. It is found that the controlled wrinkling leads to large‐area 1D periodic structures with coexisting cracking perpendicular to the grating direction—such cracks are used as connections between the two‐point contact measurement through the associated gold layer deposition. An enhanced current reduction is further observed on photoexcitation for an additional deposition of an amorphous titania layer. Subsequently, a discussion on the mechanisms and interaction between hot electron injection, charge carrier recombination, and thermalization is presented. Supported by numerical modeling, the angle‐resolved plasmonic modes with the photoresistance can be correlated. The ease of layered deposition of the materials allows one to extend the studies on cavity‐based structures with sandwiched titania layers as hotspots. This simple, scalable, and robust fabrication method thus promises an efficient routeway toward photosensor development in which plasmon‐mediated hot electrons play a crucial role.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Plasmonic Photoresistor Based on Interconnected Metal‐Semiconductor Grating ; day:14 ; month:03 ; year:2023 ; extent:12
Advanced functional materials ; (14.03.2023) (gesamt 12)
- Creator
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Ghosh, Anik Kumar
Sarkar, Swagato
Tsuda, Takuya
Chae, Soosang
Knapp, André
Nitschke, Mirko
Das, Amit
Wießner, Sven
König, Tobias A. F.
Fery, Andreas
- DOI
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10.1002/adfm.202210172
- URN
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urn:nbn:de:101:1-2023031414285356085130
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
- 14.08.2025, 10:58 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Ghosh, Anik Kumar
- Sarkar, Swagato
- Tsuda, Takuya
- Chae, Soosang
- Knapp, André
- Nitschke, Mirko
- Das, Amit
- Wießner, Sven
- König, Tobias A. F.
- Fery, Andreas
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Unravelling the effect of charge dynamics at the plasmonic metal/semiconductor interface for CO2 photoreduction