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Honeycomb RhI 3 Flakes with High Environmental Stability for Optoelectronics
The emerging 2D layered transition metal trihalides (MX ) have attracted extremely high interest given their exceptional structural and physical properties. Continuing to extend the library of 2D MX is essential for exploring new physical phenomena and enabling new functionality. Herein, the optical...
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Published in: | Advanced materials (Weinheim) 2020-06, Vol.32 (25), p.e2001979 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The emerging 2D layered transition metal trihalides (MX
) have attracted extremely high interest given their exceptional structural and physical properties. Continuing to extend the library of 2D MX
is essential for exploring new physical phenomena and enabling new functionality. Herein, the optical and electrical properties and the photodetection behavior of atomically thin RhI
flakes exfoliated from bulk crystals are reported. This compound exhibits superior air and thermal stability, as well as thickness-dependent bandgap from 1.1 (18L) to 1.4 eV (2L). Field-effect transistors based on the few-layer RhI
flakes display n-type semiconducting behavior with competitive mobility of 2.5 cm
V
s
and ON/OFF current ratio of 4 × 10
. Importantly, the outstanding responsivity of 11.5 A W
and high specific detectivity of 2 × 10
Jones are recorded from the RhI
photodetectors under 980 nm illumination at room temperature in air. These findings indicate a variety of potential applications of atomically thin RhI
flakes in future 2D-material-based electronic and optoelectronic devices. |
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ISSN: | 0935-9648 1521-4095 |
DOI: | 10.1002/adma.202001979 |