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Ternary Ta 2 PdS 6 Atomic Layers for an Ultrahigh Broadband Photoresponsive Phototransistor
- Source :
- Advanced Materials. 33:2005607
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- 2D noble-transition-metal chalcogenides (NTMCs) are emerging as a promising class of optoelectronic materials due to ultrahigh air stability, large bandgap tunability, and high photoresponse. Here, a new set of 2D NTMC: Ta2 PdS6 atomic layers is developed, displaying the excellent comprehensive optoelectronic performance with an ultrahigh photoresponsivity of 1.42 × 106 A W-1 , detectivity of 7.1 × 1010 Jones and a high photoconductive gain of 2.7 × 106 under laser illumination at a wavelength of 633 nm with a power of 0.025 W m-2 , which is ascribed to a photogating effect via study of the device band profiles. Especially, few-layer Ta2 PdS6 exhibits a good broadband photoresponse, ranging from 450 nm in the ultraviolet region to 1450 nm in the shortwave infrared (SIR) region. Moreover, this material also delivers an impressive electronic performance with electron mobility of ≈25 cm2 V-1 s-1 , Ion /Ioff ratio of 106 , and a one-year air stability, which is better than those of most reported 2D materials. Our studies underscore Ta2 PdS6 as a promising 2D material for nano-electronic and nano-optoelectronic applications.
- Subjects :
- Electron mobility
Materials science
business.industry
Band gap
Mechanical Engineering
Photoconductivity
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
medicine.disease_cause
01 natural sciences
0104 chemical sciences
Photodiode
law.invention
Ion
Wavelength
Mechanics of Materials
law
medicine
Optoelectronics
General Materials Science
0210 nano-technology
business
Ternary operation
Ultraviolet
Subjects
Details
- ISSN :
- 15214095 and 09359648
- Volume :
- 33
- Database :
- OpenAIRE
- Journal :
- Advanced Materials
- Accession number :
- edsair.doi...........b9372b0cfff19e9491221c917e1cf780