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Self-assembled metal-oxo clusters for sensitive and low-powered ultraviolet photodetectors.
- Source :
- Journal of Materials Chemistry A; 3/14/2024, Vol. 12 Issue 10, p5898-5908, 11p
- Publication Year :
- 2024
-
Abstract
- Despite their wide-bandgap nature and ultrahigh stability under high-energy UV radiation, zirconium-oxo clusters (ZOCs) have not yet been studied for applications related to ultraviolet (UV) detection. Interestingly, individual ZOCs can be self-assembled by bridging inter-cluster linkers to yield large-dimensional flakes with a notably low defect-induced trap density. Trap reduction facilitates efficient photon-generated charge transfer within the ZOC flakes compared with traditional UV-sensitive materials based on metal oxides or metal nitrides. In this paper, we propose a facile strategy for applying self-assembled ZOC square flakes to deep-UV photodetectors. Combined with a reasonable amount of highly transparent polyethylenimine (PEI) polymer, an asymmetrical metal–semiconductor–metal (MSM) device based on the ZOC@PEI composite film exhibited an excellent UVC photoresponse with a detectivity of 1.91 × 10<superscript>12</superscript> Jones and an external quantum efficiency of 125%. This work, for the first time, demonstrates the considerable potential of utilizing ZOCs as an efficient photoactive component in highly sensitive and low-powered UV photodetectors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 175855289
- Full Text :
- https://doi.org/10.1039/d4ta00333k