研究目的
Exploring photodetectors with higher responsitivity and broader spectral response for optoelectronic applications.
研究成果
The CdS core-Au/MXene-based photodetectors demonstrated the capability of detecting photons across a broad spectrum from deep-ultraviolet to near-infrared, with higher responsivity and specific detectivity under visible light illumination due to the thermal mechanism, and positive photoresponse under deep-ultraviolet light. These findings pave the way for broad spectral photodetectors and other inventive optoelectronic devices.
研究不足
The response time was slow (about several seconds) due to a large transition length. The study also noted the complexity of explaining the big difference in bandgap between intrinsic CdS and the CdS used in the work.
1：Experimental Design and Method Selection:
The study involved the preparation of CdS core-Au plasmonic satellites nanostructure by all-solution processing and the assembly of photodetectors using MXene as electrodes.
2：Sample Selection and Data Sources:
CdS core-Au nanostructures were prepared through hydrothermal method and characterized using SEM, HRTEM, EDS, XRD, and Raman spectroscopy.
3：List of Experimental Equipment and Materials:
Equipment included SEM (Zeiss Gemini300), HRTEM (Titan G260-300), UV–Vis spectrophotometer (Bruker D8 DISCOVER), and XRD (Bruker D8). Materials included HAuCl4·4H2O, sodium citrate, thiourea, cadmium acetate, and APTMS.
4：8). Materials included HAuCl4·4H2O, sodium citrate, thiourea, cadmium acetate, and APTMS. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The CdS core-Au nanostructure was prepared, characterized, and then used to fabricate photodetectors. The performance was measured under various light wavelengths and intensities.
5：Data Analysis Methods:
The photocurrent was measured using keithley 2400 SCS, and responsivity and detectivity were calculated based on the photocurrent and light intensity.
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