Abstract
Ag-doped ZnO nanorods growth on a PET-graphene substrate (Ag-ZnO/PET-GR) with different Ag-doped content were synthesized by low-temperature ion-sputtering-assisted hydrothermal synthesis method. The phase composition, morphologies of ZnO, and electrical properties were analyzed. Ag-doping affects the initially perpendicular growth of ZnO nanorods, resulting in oblique growth of ZnO nanorods becoming more obvious as the Ag-doped content increases, and the diameter of the nanorods decreasing gradually. The width of the forbidden band gap of the ZnO films decreases with increasing Ag-doped content. For the Ag-ZnO/PET-GR composite structure, the Ag-ZnO thin film with 5% Ag-doped content has the largest carrier concentration (8.1 × 1018 cm−3), the highest mobility (67 cm2 · V−1 · s−1), a small resistivity (0.09 Ω·cm), and impressive electrical properties.
Highlights
Our studies explore the controllable growth parameters of ZnO nanostructures, the relationship between process parameters and structure, and the influence of the substrate on the morphology and performance of ZnO nanostructures for the Ag-ZnO/PET-GR composite structure
In addition to the miscellaneous peaks belonging to the PET-GR substrate in the X-ray diffraction (XRD) pattern, compared with the pure ZnO/PET-GR film, the Ag-doped ZnO film exhibits stronger Ag diffraction peaks, Ag(111) and Ag(200), Ag(220), which are consistent with the Ag standard diffraction spectrum (No 36-1451) on the JCPDS database
In order to prove that the Ag ions have been incorporated into the ZnO lattice successfully, Xray photoelectron spectroscopy (XPS) was used to analyze the ZnO film with 1% silver nitrate doping concentration (1% Ag-ZnO)
Summary
Flexible optoelectronic devices have changed the rigid physical form of traditional devices, greatly expanded the development and application of optoelectronic devices, and widely applied in the fields of artificial skin, batteries, sensors, intelligent robots, wearable energy collectors, flexible displays, and other high-tech fields (Lou and Shen, 2015; Chortos et al, 2016; Han et al, 2017; Li et al, 2019; Wu et al, 2019; Zou et al, 2019; Liang et al, 2020; Shen et al, 2020; Zhang P. et al, 2020; Chen et al, 2021; Zhu et al, 2021). A combined PET-GR composite flexible substrate, by adjusting the two kinds of structure unit and the intrinsic physical dimension constant, can exhibit excellent physical and chemical properties, realize synergy compensation, greatly expand the functionality of graphene-based applications (Liu and Lei, 2016), and effectively solve the mismatching of the thermal expansion coefficient between PET and ITO as well as the exfoliation phenomenon of ITO caused by device heating. From the perspective of materials science, the in-depth study of the properties of ZnO-based flexible films can provide a theoretical and scientific basis for the development of high-performance flexible electronic devices (Qian et al, 2016). Ag-doped ZnO nanorods grown on the double-layer film of graphene-coated polyethylene terephthalate (PET-GR) were synthesized by low-temperature ion-sputteringassisted hydrothermal synthesis method, by introducing a few amount of silver nitrate [Ag(NO)3] to zinc nitrate hexahydrate [Zn(NO3)2·6H2O] and hexamethylenetetramine (C6H12N4, HMTA), to investigate the photocatalysis mechanism of the Ag-ZnO/PET-GR composite structure. The electrical performance parameters of the Ag-ZnO/PET-GR composite structure were measured using a Hall effect tester (Hall-8800) at a temperature of 300 K using the Van der Pauw method
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