研究目的
To address the issue of ZnO's utility in broadband photodetectors due to its absorbance in the UV region only with low quantum efficiency and responsivity, by reporting Fe metal doped 2D ZnO thin films through band gap engineering and 1D electrospun mixed inorganic monoclinic BiVO4 nanofibers heterostructure on ITO coated PET substrate based broadband photodetector with ultra-high responsivity and EQE values.
研究成果
The study successfully demonstrates the fabrication of a hybrid, flexible broadband photodetector using Fe doped ZnO thin films and BiVO4 nanofibers, showing high responsivity and EQE values across UV, Visible, and NIR regions. The device's performance, coupled with its simple and cost-effective fabrication, presents a new approach for developing flexible electronics and high-performance optoelectronics devices.
研究不足
The study does not explicitly mention limitations, but potential areas for optimization could include the rise time of the device and the uniformity of nanofiber dispersion.
1：Experimental Design and Method Selection:
The study involves the fabrication of Fe doped ZnO (FZO) thin films through band gap engineering and 1D electrospun mixed inorganic monoclinic BiVO4 nanofibers heterostructure on ITO coated PET substrate. The methodology includes hydrothermal method for FZO thin films and electrospinning for BiVO4 nanofibers.
2：Sample Selection and Data Sources:
The samples include FZO thin films and BiVO4 nanofibers. Data sources include morphological and structural characterization techniques such as FESEM, XRD, Raman spectroscopy, and UV-Vis spectra.
3：List of Experimental Equipment and Materials:
Equipment includes ZEISS Ultra-55 SEM for FESEM, X’pert PRO X-ray diffraction for XRD, Raman Spectrometer (Senterra in Via opus, Bruker) for Raman spectroscopy, ELICO SL 210 UV Vis Spectrophotometer for UV-Vis spectra, and Keithley 2450 SMU for electrical characterization. Materials include Iron (II) Chloride tetrahydrate, Ammonia, Zinc Nitrate Hexahydrate, and others for FZO, and Citric acid, DMF, Ethanol, Bismuth (III) nitrate Pentahydrate, PVP, Ammonium Metavanadate for BiVO
4：Experimental Procedures and Operational Workflow:
The synthesis involves the preparation of FZO thin films via hydrothermal method and BiVO4 nanofibers via electrospinning, followed by device fabrication and characterization.
5：Data Analysis Methods:
The analysis includes the calculation of responsivity, specific detectivity, and EQE using provided formulae, and interpretation of morphological and structural data to understand the device performance.
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