NDLI: Low frequency noise and photo-enhanced field emission from ultrathin PbBi<sub>2</sub>Se<sub>4</sub> nanosheets

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Inside back cover

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Journal of Materials Chemistry C Vol -3

Journal of Materials Chemistry C Vol -2

Journal of Materials Chemistry C Vol -1

Low frequency noise and photo-enhanced field emission from ultrathin PbBi₂Se₄ nanosheets

Content Provider	Royal Society of Chemistry (RSC)
Author	Guin, Satya N. Suryawanshi, Sachin R. More, Mahendra A. Kashid, Vikas Late, Dattatray J. Chatterjee, Arindom Biswas, Kanishka
Copyright Year	2016
Abstract	Atomically thin two-dimensional layered materials have gained wide interest owing to their novel properties and potential for applications in nanoelectronic and optoelectronic devices. Here, we present the spectral analysis and photo-enhanced field emission studies of a layered intergrowth PbBi2Se4 nanosheet emitter, performed at the base pressure of ∼1 × 10−8 mbar. The emitter shows a turn-on field value of ∼4.80 V μm−1, corresponding to an emission current density of ∼1 μA cm−2. Interestingly, when the cathode was illuminated with visible light, it exhibited a lower turn-on field of ∼3.90 V μm−1, and a maximum emission current density of ∼893 μA cm−2 has been drawn at an applied electric field of ∼8.40 V μm−1. Furthermore, the photo-enhanced emission current showed reproducible, step-like switching behavior in synchronous with ON–OFF switching of the illumination source. The emission current–time plots reveal excellent stability over a duration of ∼6 h. Low-frequency noise is a significant limitation for the performance of nanoscale electronic devices. The spectral analysis performed on a Fast Fourier Transform (FFT) analyzer revealed that the observed noise is of 1/fα type, with the value of α ∼0.99. The low frequency noise, photo-enhanced field emission, and reproducible switching behavior characterized with very fast rise and fall times propose the layered PbBi2Se4 nanosheet emitter as a new promising candidate for novel vacuum nano-optoelectronic devices.
Starting Page	1096
Ending Page	1103
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	4
Issue Number	5
Journal	Journal of Materials Chemistry C
DOI	10.1039/c5tc02993g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Optoelectronics Nanosheet Bar (unit) Micrometre Electric current Cathode Electric field Fast Fourier transform
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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