研究目的
Investigating the tunable localized surface plasmon resonance and broadband visible photo-response of Cu nanoparticles/ZnO surfaces for applications in photo-detection, photonics, and photovoltaics.
研究成果
The study demonstrates that Cu NP deposited by ALD on ZnO films exhibit tunable LSPR between the visible and near-infrared ranges, controlled by the number of ALD cycles. The Cu NP/ZnO device shows enhanced photo-response under white light illumination, with good responsivity values and fast response times. This opens avenues for the development of new systems for plasmon-enhanced light-emitting and photovoltaic devices.
研究不足
The study is limited to the characterization of Cu NP/ZnO devices under visible light illumination. The response times, although promising, could be further optimized. The study does not explore the full potential of the devices under different wavelengths of light beyond the visible spectrum.
1：Experimental Design and Method Selection:
Cu nanoparticles were grown on ZnO thin films by atomic layer deposition (ALD) using Cu(hfac)2 as a copper precursor and deionized water as a reactant. The growth mode was Volmer–Weber island growth.
2：Sample Selection and Data Sources:
ZnO films were grown by reactive magnetron sputtering on Si (100) and glass substrates.
3：List of Experimental Equipment and Materials:
ALD PICOSUN? R-200 Advanced Reactor, Philips XL-30 S-FEG SEM, Bruker D8 Advanced diffractometer, JEOL ARM 200F Cold FEG TEM/STEM, NTEGRA AFM (NT-MDT) system.
4：Experimental Procedures and Operational Workflow:
Different number of ALD cycles were used ranging from 20 to
5：Ellipsometric measurements, SEM, TEM, X-ray diffraction, and conductive atomic force microscopy (C-AFM) measurements were performed. Data Analysis Methods:
100 The optical responses of Cu NP were determined by spectroscopic ellipsometry using an effective medium approach. The average NPLS distribution was determined with the Image J software.
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