Search

In this work, we prepared lead-free 0.5Ba(Zr 0.2 Ti 0.8 )O 3 −0.5(Ba 0.7 Ca 0.3 )TiO 3 nanorods (BCTZ NRs) by using electrospinning method. XRD, FESEM and Raman were used to characterize BCTZ NRs. XRD pattern showed BCTZ NRs to have tetragonal phase structure. BCTZ NRs were used to fabricate a bio-compatible piezoelectric nanogenerator (pNG). In order to enhance the output property of pNG, dielectrophoresis was employed to align the BCTZ NRs in the PDMS matrix. By tapping the pNG, the open-circuit voltage (V oc ) and short-circuit current (I sc ) of ~0.8 V and ~7 nA were obtained, respectively. Furthermore, the pNG can be used as a water-drops counter. The good electric output performance of BCTZ made it suitable for some control systems of electronic devices.

Recently, flexible nanogenerators have attracted much attention due to the continuous demand of portable electronic devices. Thus, in our present work, a flexible piezoelectric nanogenerator (pNG) was fabricated by mixing 0.5Ba(Zr 0.2 Ti 0.8 )O 3 -0.5(Ba 0.7 Ca 0.3 )TiO 3 nanoparticles (BCTZ NPs) and a PDMS polymer matrix. The flexible device exhibited excellent performance with maximum open-circuit voltage of 0.6 V and short-circuit current of 7.5 nA. BCTZ NPs were prepared by a reaction between a metallic salt and a metallic oxide in a solution of composite-hydroxide eutectic. XRD pattern showed BCTZ NPs to have pure perovskite structure. In this paper, the structure, morphology of the BCTZ NPs, and electric property of the BCTZ-based pNG were systematically studied. With the advantages of small-size, environmentally friendly, high flexibility, and high-sensitivity to external vibration, BCTZ will open up a range of new applications.