Polyvinylidene fluoride (PVDF) is the most widely used flexible piezoelectric material, but its piezoelectric performance is relatively weak compared with piezoelectric ceramics. In order to improve the piezoelectric properties, ZnO nanoarrays/polyvinylidene fluoride-hexafluoropropylene(PVDF-HFP) hybrid piezoelectric nanogenerators were prepared. ZnO nanoarrays were adjustable with different hydrothermal time. The results showed that when the hydrothermal time was 12 h, the length of ZnO nanoarrays with uniform and compact arrangement was about 4 μm to 5 μm, which maximized the performance improvement of the nanogenerators. The applications of the hybrid nanogenerators were explored in touch alarm system and finger bending detection.
A transparent conductive metal mesh film (TCMMF) was successfully fabricated by a low-cost and simple process. Firstly, the crack mask pattern is obtained after a certain heat treatment process, based on a glass substrate coated with egg-white. Then, a TCMMF was fabricated in combination with a series of processes such as metal deposition and mask removal. In this paper, the film formation mechanism and performance of the TCMMF based on random crack templates are studied, and the TCMMF have also been used in perovskite solar cells (PSCs).The results showed that the TCMMF’s transmittance is more than 90% in the UV-visible range and infrared-visible range. The TCMMF’s surface resistance measured by the four probe method is 20 Ω/□. The performance of the PSCs based on the TCMMF can be comparable to that of the PSCs based on ITO, with a photoelectric conversion efficiency of 13.8%. This provides a possibility for the application of TCMMF in photovoltaic and photovoltaic fields.
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