研究目的
To demonstrate the GDY-based PEC-type photodetection, by depositing its NSs onto the flexible ITO-coated poly(ethylene terephthalate) (PET) substrate and to explore the electronic characteristics of GDY for performance enhancement in alkaline electrolyte.
研究成果
The ultrathin GDY NSs were prepared and deposited on the flexible PET substrate for PEC-type photodetection applications. The systematic studies suggest a high Pph of 5.98 μA cm?2, a remarkable Rph of 1086.96 μA W?1, a pronounced detectivity of 7.31 × 1010 Jones, and excellent long-term stability in 0.1 M KOH for the GDY-NSs-based flexible PDs.
研究不足
The GDY-based PDs show poor flexibility in structure and the most selected substrate is the rigid ITO-coated glass, which have impeded the development of flexible PEC-type photodetection.
1：Experimental Design and Method Selection:
The GDY was synthesized through the in situ cross-coupling method, and the as-prepared GDY was further treated by using ball-milling and the facile LPE method. Finally, the GDY was deposited on the flexible PET substrate through spin-coating as the working electrode of the standard three electrodes for the PEC-type photodetection.
2：Sample Selection and Data Sources:
The ITO-coated PET membranes were used as the flexible substrate for preparing GDY-based working electrode.
3：List of Experimental Equipment and Materials:
N-Methyl-2-pyrrolidone (NMP,
4：5%), poly(vinylidene fluoride) (PVDF, Mn = 71 000 g mol?1), ethanol, acetone, and dimethyl formamide (DMF, 9%). Experimental Procedures and Operational Workflow:
The GDY was first dispersed in NMP electrolyte, and the ultrathin GDY NSs were obtained through the LPE methods. The GDY-based working electrode was prepared by spin-coating GDY onto PET membranes.
5：Data Analysis Methods:
The photo-response behaviors of GDY were studied in a standard three electrodes PEC-type photodetection system.
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UV–vis–NIR spectrophotometer
UV-3150
Hitachi
Used to perform the optical absorption spectrum.
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Raman spectroscopy
HORIBA Lab RAM HR800
HORIBA
Used to examine the structure of GDY.
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Ti:sapphire laser
800 nm, 100 fs, 1 kHz, Spitfire Ace
Spectra-Physics
Used to generate femtosecond pulses for TA spectrometer.
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optical parametric amplifier
TOPAS Prime
Spectra-Physics
Used to generate femtosecond pulses for TA spectrometer.
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N-Methyl-2-pyrrolidone
NMP, 99.5%
Sigma-Aldrich
Used as a solvent in the synthesis of ultrathin GDY NSs.
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poly(vinylidene fluoride)
PVDF, Mn = 71 000 g mol?1
Sigma-Aldrich
Used in the preparation of GDY working electrode.
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field-emission SEM
Hitachi S-4700
Hitachi
Used to study the morphology of GDY and GDY-based PDs.
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TEM
FEI Talos200F
FEI
Used to study the morphology of GDY and GDY-based PDs.
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AFM
Dimension ICON
Bruker
Used to study the morphology of GDY and GDY-based PDs.
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XPS
Thermo Scientific ESCALAB 250Xi
Thermo Scientific
Used to characterize the C 1s envelope.
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ethanol
Aladdin Company
Used for cleaning PET membranes.
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acetone
Aladdin Company
Used for cleaning PET membranes.
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dimethyl formamide
DMF, 99.9%
Aladdin Company
Used in the preparation of GDY working electrode.
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ITO-coated PET membranes
10 × 20 mm2
Used as the flexible substrate for preparing GDY-based working electrode.
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