研究目的
Exploring a spray deposition technique to prepare thin films based on nanocomposites of graphene oxide (GO) or reduced graphene oxide (rGO) with CuInGaSe2 quantum dots (QD) synthesized by a microwave-assisted method and evaluating their morphological and electrochemical properties.
研究成果
The study successfully demonstrated the synthesis of CuInGaSe2 QDs using a microwave-assisted method and their combination with GO or rGO to form nanocomposites. The spray deposition technique was effective in preparing thin films with potential applications in dye-sensitized solar cells, as evidenced by the use of rGO-QD films as counter electrodes.
研究不足
The study is limited by the interaction strength between QDs and graphene derivatives, which may affect the electronic properties of the composites. The spray deposition technique may also introduce variability in film thickness and uniformity.
1：Experimental Design and Method Selection:
Microwave-assisted synthesis of CuInGaSe2 QDs and preparation of nanocomposites with GO or rGO.
2：Sample Selection and Data Sources:
Use of as-synthesized CIGSe QDs and aqueous suspensions of GO or rGO.
3：List of Experimental Equipment and Materials:
Microwave, ultrasonic spray system, TEM, SEM, AFM, Raman spectrometer, UV-vis spectrophotometer, etc.
4：Experimental Procedures and Operational Workflow:
Synthesis of QDs, ligand exchange, preparation of composites, spray deposition, and characterization.
5：Data Analysis Methods:
Analysis of morphological, optical, and electrochemical properties of the thin films.
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Analytica Jena Specord 5D UV-vis Spectrophotometer
Specord 5D
Analytica Jena
Determine the absorbance measurements
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FEI G2 Tecnai spirit transmission electron microscope
G2 Tecnai spirit
FEI
Obtain TEM images of samples
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Bruker D2 Phaser X-ray diffractometer
D2 Phaser
Bruker
Determine the structural properties
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FEI Inspect F50 microscope
Inspect F50
FEI
Obtain SEM images of the sprayed thin films
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Olympus B51x microscope
B51x
Olympus
Take optical microscopy images of the thin films
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Nanosurf, EasyScan2 microscope
EasyScan2
Nanosurf
Acquire AFM images
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Perkin Elmer Lambda 900 UV/VIS/NIR spectrophotometer
Lambda 900
Perkin Elmer
Measure the transmittance
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Autolab PGSTAT302N potentiostat with a FRA module
PGSTAT302N
Autolab
Perform electrochemical impedance spectroscopy (EIS) measurements
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Perkin Elmer LS45 fluorescence spectrophotometer
LS45
Perkin Elmer
Analyze the photoluminescence (PL) of the as-synthesized nanocrystals
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Tescan Mira 3 FEG-SEM microscope
Mira 3 FEG-SEM
Tescan
Carry out EDS analysis
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Horiba Jobin Yvon model T64000 Raman confocal spectrometer
T64000
Horiba Jobin Yvon
Record Raman spectra of the films
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Thin Film Devices, INC, model FPP-2000
FPP-2000
Thin Film Devices, INC
Measure surface resistivity by four-point probe technique
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ExactaCoat coating system
ExactaCoat
Sonotek Corp.
Perform ultrasonic spray depositions
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AccuMist? nozzle
AccuMist
Sonotek Corp.
Used with the ExactaCoat coating system for spray deposition
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