Abstract
Abstract The band gap of two-dimensional (2D) materials become a hot issue for photoelectric detection. Recently, public attention is thoroughly aroused as to the remarkable electrical transport characteristic and super photoresponse of 2D graphdiyne. The simulation results show that the photoresponse can be adjusted in various solutions based on the graphdiyne nanosheets with different sizes and thicknesses. Based on few-layered graphdiyne nanosheets prepared by a liquid-phase exfoliation method, a photoelectrochemical (PEC)-type few-layered graphdiyne photodetector is demonstrated in this paper. A group of PEC tests are carried out in neutral solution to verify the simulation results. The as-prepared graphdiyne photodetector possesses high photocurrent density, effective responsivity and excellent cycle stability in condition of KCl electrolyte and solar illuminance. The detectivity of the PEC-type graphdiyne photodetector can be easy to adjust by altering electrolyte concentration and other corresponding parameters, which indicates the proposed equipment can be a good candidate for photoelectric detection.
Highlights
Light detection is an indispensable behavior where the optical signal can be converted into an electrical signal and it plays an important part in transducer, communication and spectroscopy
The photoresponse can be adjusted in various solutions based on the graphdiyne nanosheets with different sizes and thicknesses. 2D graphdiyne nanosheets have been presented with a businesslike liquid exfoliation approach and were succeed in employing for PEC-type photodetector
This paper shows the fundamental relationship between the photoresponse property and graphdiyne nanosheets based photodetectors, revealing its potential optoelectronic applications because of its intrinsical construction and photoelectronic ability
Summary
Light detection is an indispensable behavior where the optical signal can be converted into an electrical signal and it plays an important part in transducer, communication and spectroscopy. Black phosphorus (BP) has been widely studied and it reveals excellent talent in photoelectronic devices [5,6,7,8,9], sensors [10, 11], lithium ion batteries [5, 12, 13], solar cells [14, 15], and biomedicine [16,17,18] owing to its tunable direct band gap [19, 20], high electronics ON/OFF ratio [21] and high carrier mobility [22]. Non-layered 2D materials have been favored by researchers [24, 47,48,49] owing to their unique properties of affluent dangling bonds, particular structural distortion, adjustable band gap, and high carrier mobility [50,51,52,53,54]. The photoelectronic performance of graphdiyne PEC-type photodetector in different KCl concentrations was investigated
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